[[quoteright:337:[[OurWerewolvesAreDifferent http://static.tvtropes.org/pmwiki/pub/images/werewolf_9693_8856.jpg]]]]
[[caption-width-right:337:[[DoubleEntendre Guess it's that time of the month again!]]]]
[-[[caption-width-right:337:[[http://kerembeyit.deviantart.com/art/Suburbian-Nightmare-29299185 Image]] by [[http://kerembeyit.deviantart.com Kerembeyit]].]]-]

->''"Do you feel it, the moon's power?"''
-->-- '''Saïx''', before unleashing his true nature, ''VideoGame/KingdomHeartsII''

The moon does things to people. [[AllPeriodsArePMS Makes women crazy]], drives the lunatics, or maybe enhances your supernatural powers. The full moon might bring out the monster in someone, or a new moon may [[BroughtDownToNormal bring the human]] out of a monster. In general, the moon is often a catalyst in magical things.

More mundane things are stealth on the night of a new moon, or illumination on the night of a full moon. A full moon is associated with [[OurWerewolvesAreDifferent lycanthropy]] as the most common way to trigger the transformation (a trope that is somewhat NewerThanTheyThink). The duality of the sun and moon is also seen as mirroring the duality of men and women. From that, the moon is usually a feminine symbol (this may be because both have [[AllPeriodsArePMS monthly cycles]]).

The words "lunacy", "lunatic", and "loony" are derived from "Luna" because of the folk belief in the moon as a cause of periodic insanity. When planning stealthy invasions some characters will wait for the night of a new moon when the sky is the darkest.

See BadMoonRising for situations where the moon itself is changed. See also MelancholyMoon for when used as a sad backdrop.


[[folder:Anime and Manga]]
* Inverted In ''{{Manga/Inuyasha}}''. Inuyasha loses his demonic powers during the new moon.
* Saiyans with tails on turn into giant monkeys by seeing the moon in ''Franchise/DragonBall''. In one of the few times that the author tries to rationalize anything in this manga, Vegeta explains that Saiyans absorb the special frequency of light caused by the full moon and a certain gland in their tails prompts their transformation. This also means that anything that can generate that same light can trigger the transformation. Gohan's transformation was triggered a second time (after Piccolo destroyed the moon to stop his first transformation) by Goku's original pod projecting an image of a full moon into the sky. Saiyans figured out how to create a Power Ball that could simulate full moonlight, which Vegeta used against Goku in their first battle after losing a BeamOWar with him.
* In ''VisualNovel/{{Tsukihime}}'', power of vampires is dependent on the phase of the moon. On full moon, even [[spoiler:regenerating from one's ankles up]] is possible. The reason for this is [[spoiler:all vampires are descended from what is essentially the AnthropomorphicPersonification of the moon: Crimson Moon Brunestud.]]
* Similar to the Tsukihime example, vampires (or at least Evangeline, the only vampire we've actually met) in ''Manga/MahouSenseiNegima'' grow stronger as the moon gets closer to full. It's subverted in that she gets more mileage out of people knowing this and thus being less prepared for what she can do when the moon's ''not'' full. We haven't actually seen her and a full moon together since learning about the connection. From her.
* ''Franchise/SailorMoon'', whose powers are fueled by [[ThePowerOfLove love]], [[ThePowerOfFriendship friendship]], and the [[ExactlyWhatItSaysOnTheTin MOON!]]
* Cure Moonlight from ''Anime/HeartcatchPrettyCure''. Although her Lunacy just makes her super strong without making her insane (she's in fact [[LadyOfWar the most graceful fighter]] in the team), with side order of some BarrierWarrior capabilities.
* Koromo Amae from ''{{Manga/Saki}}''. While normally sweet and innocent, her aggression and strength go up while underneath a full moon. [[BerserkButton Way up.]]
* In ''LightNovel/ACertainMagicalIndex'', the ArchangelGabriel is strengthened by the Moon due to its elemental alignment. Both times it appears, the Moon is not up, so it solves this by ''casually and instantly'' causing nightfall and a full moon. Since Acqua of the Back is empowered by Gabriel, he is also powered up by the moon.
* In ''Manga/{{Naruto}}'' the demon {{Tanuki}} sealed inside of Gaara is at its most powerful, and it's easier for Gaara to transform into Shukaku. (Thus, at least pre-time-skip, Gaara arguably counts as a [[OurWerewolvesAreDifferent were-tanuki.)]]
* In ''Manga/DailyLifeWithMonsterGirl'', females of the monster races essentially go into heat during the full moon. This scares the hell out of our hero, not because he doesn't want to sleep with the girls (he does), but because he knows that having sex with a lamia/centaur/harpy that isn't holding back their strength ''would kill him''.
* In ''Manga/CardcaptorSakura'', Syaoran develops a crush on Yukito, because Yukito is really [[spoiler:Yue]], and thus has a lot of moon-energy, and Syaoran draws energy from the moon himself. ([[FridgeLogic Strangely]], Kaho is another moon-energy-manipulator, and yet Syaoran doesn't develop any sort of attraction to her. In fact, he's afraid and suspicious of her.)
** The Clow Cards are divided into two elemental super groups, either symbolized by either the Sun (Keroberos) or the Moon (Yue). The classic four elements are then divided under them (Fire and Earth under the Sun, Wind and Water under the Moon) and the other cards divided under the classical elements.
* In ''LightNovel/TheDevilIsAPartTimer'', the angel Sariel is powered up by the moon. He can power up even more by ''drawing the moon closer to Earth''.
* In ''Manga/OnePiece'', Wanda talks about the full moon with the Straw Hats and how they're fortunate that the moon is covered by clouds during that night. [[spoiler:The Mink Tribe gains a power up when they stare at a full moon, which causes them to transform into a form known as Ceylon, making them ''much'' more powerful and faster. When Carrot demonstrated her Ceylon form in chapter 888, she also gained very long MysticalWhiteHair. While the Ceylon form can make a Mink stronger, it can quickly drain their stamina and possibly make them die of exhaustion. However, Minks can revert back to normal by not looking at moonlight.]]

[[folder:Comic Books]]
* The character Comicbook/MoonKnight in Marvel comics is a former special forces operative that met and became the Avatar of the Egyptian god of the Moon and Revenge. Or he is just bat shit crazy as he suffers from extreme multiple personality disorder at times. [[BunnyEarsLawyer His ability to be a hero]] just makes up for how full blown bonkers he can become, as he actually [[WhatTheHellHero cut the face off his arch enemy]] at one point.
* The Nightmare forces from ''ComicBook/MyLittlePonyFriendshipIsMagicIDW'' draw their power from the moon, and a full moon empowers them enough for one more chance at escaping.
* Inverted with [[ComicBook/TheIncredibleHulk the Grey Hulk]], the first one, when Banner turned into the Hulk at night and became human in the day. Peter David took it as a new character, different to the regular green Hulk, and explained: the great enemy of the grey Hulk was the Sun, which turned him into Banner. As for the moon, it reflects a portion of sunlight, not enough to turn him into Banner, but to allow him to influence the Hulk. So, when the moon is full, he will be happy and cheerful. It is when the lunar phase is at new moon that the evil Grey Hulk is at his prime.

* In ''WesternAnimation/{{Epic}}'' the light of the moon at its highest point in a hundred years will cause the pod to bloom into Tara's successor. [[spoiler:And lack of it will cause it to bloom into Mandrake's successor.]]

* As you might expect, the titular Princess of FanFic/RainbowDoubleDashsLunaverse has power over the moon. She controls its rising and setting, and can merge with it to heal from otherwise mortal wounds.

* Name a series with [[OurWerewolvesAreDifferent werewolves]] in it, any series.
** Literature/{{Discworld}} subverts the "full moon = magic" cliché: the effect of the full moon on werewolves is mentioned but rarely has much impact (though there is the humorous consequence of werewolves suffering from their 'time of the month' - PLT, Pre-Lunar Tension). Instead, on Discworld the most magical phase is a half moon, because it represents LiminalTime and [[BalanceBetweenGoodAndEvil the edge between light and darkness]].
** The Literature/NightWatch averts it completely. Werevolves do suffer from periods of uncontrollable transformation and feral rage, but the timing depends on their biology and has nothing to do with the state of the moon.
** "The Wife's Story" by Creator/UrsulaKLeGuin involves a transformation on ''moonless'' nights. It's made obvious early on that something even weirder than usual is going on. [[spoiler:[[TomatoSurprise The narrator's a wolf]], and the "monster" transforms into a human.]]
** In Kelley Armstrong's Literature/{{The Otherworld}}, werewolves have to change approximately weekly, unless they want to have weird things happen like their hands turning into paws in the middle of a grocery store (or just changing spontaneous, with an associated loss of control). At one point the Alpha explains that while they do often change on the full moon, it has more to do with the added light being good for hunting than the phase the moon is in.
** In Literature/TheDresdenFiles, there are four types of werewolves, however only one is bound by the full moon: loup-garou. These are cursed people and it is generally inherited through the bloodline. The victim of the curse becomes an insanely powerful feral wolf who will kill anything that gets in its path from moon rise to either moon set or sun rise. A loup-garou can only be killed by silver that was ''inherited''. No other type of attack would take one down as it heals from any wound instantly and resists mind-altering magic.
* In the ''Literature/JamesBond'' novel ''Literature/FromRussiaWithLove'', Red Grant, [=SMERSH's=] Chief Executioner, has homicidal urges coinciding with the full moon; his SMERSH file categorizes him as a [[HollywoodPsych manic-depressive psychopath]]. In the intro of the novel his wristwatch is described to show the phases of the moon.
* In the C.J. Henderson novel ''[[Literature/TeddyLondon All Things Under the Moon]]'', the villain explains that the moon doesn't trigger his transformations: "The moon does not make me into a monster. I did that to myself - a long time ago. The moon only makes the monster kill."
* Creator/HarryTurtledove's ''Literature/{{Werenight}}'' revolves around that world's [[WeirdMoon three moons going full at once]], which triggers lycanthropic transformations in every single person who may remotely have the bloodline for it.
* This is a major theme in most of Simon R Green's works. Most notably his "Literature/BlueMoonRising" series in which the world is plunged into chaos and darkness when the titular moon rises and a demon horde is unleashed, and his standalone novel ''Literature/DrinkingMidnightWine'' which features an AnthropomorphicPersonification of the moon itself who is stark staring bonkers!
* In Creator/RobertEHoward's Literature/ConanTheBarbarian story "Literature/ShadowsInTheMoonlight" Olivia deduces [[DreamingOfTimesGoneBy from her dream]] that the moonlight is restoring the TakenForGranite statues.
-->''"There is witchcraft in the moon," she shuddered. "He pointed at the moon; while the moon shines on them, they live. So I believe."''
* In ''Literature/TheNameOfTheWind'', when Elodin and Kvothe visit [[BedlamHouse the Rookery]], it's commented that the moon makes the patients worse. [[JustifiedTrope This may actually be true]], since the moon seems to be linked to both their world and the Fae realm, and the insane may be seeing through a weak spot between worlds.
* In the ''Literature/WingsOfFire'' series, [=NightWing=] dragons born on a moonlit night have either precognition or telepathy. Dragons born under [[AlienSky twin moons]] get both.
* In ''Literature/TheRedTent'', the women menstruate like clockwork right around the new moon, unless they are pregnant or not of reproductive age. Jacob's wives (and eventually, Dinah) begin first, and the bondswomen and the wives of Jacob's sons typically start a day or two later. In RealLife, menstrual cycles ''usually'' don't synch up that much, nor are they always corollated with the moon's phases.
* ''Literature/NightmareHall'': The killer in ''Dark Moon'' believes they gained special powers from the moon.

[[folder:Live Action TV]]
* An episode of ''Series/{{Castle}}'' focuses on two murders committed on the evening of the full moon; the beginning features a scene of utter chaos in the station house, with a whole load of lunatics and maniacs causing havoc in the squad room, and all the phones ringing off the hook... with Detective Beckett calmly sitting at her desk doing paperwork and Richard Castle happily sitting beside her with a bowl of popcorn watching the chaos.
* ''Series/KamenRiderDouble''[='=]s Luna Memory grants him the power of the Moon; officially it grants "[[MasterOfIllusion the power of illusions]]", which manifests as RubberMan powers for his GoodOldFisticuffs ('''Joker''') and SimpleStaff ('''Metal'''), and {{Roboteching}} BeamSpam for his {{Handgun}} ('''Trigger''')
* In ''Series/PowerRangersWildForce,'' Zen-Aku is like Inuyasha - on the night of the new moon, he loses his powers [[spoiler:and becomes his human self again]]. However, he gets full moon power Inuyasha doesn't get. Basically, his power waxes and wanes with the moon's phases as a rule. (This also accounts for the traditional StrongAsTheyNeedToBe factor the show has. Invincible in his first and last battles; whenever one Ranger is a match for him, it must not be near full moon time!)
** When Merrick fully broke Zen-Aku's control and became [[SixthRanger the Lunar Wolf Ranger]], he retained the moon motif, and on one occasion, when the other Rangers lent him the powers of their primary Wild Zords, it turned the Predazord into a ''Blue Moon'' form, giving it a temporary paintjob and a giant energy beam finisher.
* ''Series/PowerRangersMysticForce'' had [[IneptMage Clare]] [[LegacyCharacter taking up her mother Niella's powers]] as [[BarrierWarrior the Gatekeeper]], themed and powered by the moon. [[TransformationNameAnnouncement "Power of the shining moon... behold, the Gatekeeper!"]]
* In the ''Series/{{Charmed}}'' episode; "Once in a Blue Moon", when two Blue Moons occur in a year, weird things happen. Including The Charmed Ones turning into ''[[{{Werewolf}} werewolves]]''. And yes, it did coincide with "that time of the month".
* Downplayed during one episode of ''Series/{{Chef}}''. A wedding is set to occur on a full moon. Savannah predicts that the romantic atmosphere will [[CleaningUpRomanticLooseEnds clean up all the romantic loose ends]]. Ironically, everyone but her gets their wish.

* A rather famous song by the Spanish group Music/{{Mecano}}, "Hijo de la Luna" (Son of the Moon in Spanish) tells the story of a gypsy girl who in exchange for her first-born son, the moon will grant her a husband. [[spoiler:When the son is born, he is an albino kid: the husband confronts his wife about it and kills her in the process, abandoning the child in the mountains.]] The audience is told that that the moon is full when the child is in a good mood, and wanes to make him a cradle if he cries.
* Music/{{Disturbed}}'s The Animal.
-->''For the beast is coming to life./Taking form in the glimmer of this '''tainted moonlight'''./Death approaches on this night.''
* In Music/EmilieAutumn's "Girls! Girls! Girls!", the host of a BedlamHouse [[ComeToGawk freakshow]] explains that women are predisposed to insanity because of the link between "lunacy" and ovulating by the cycle of the moon.

* Many lunar deities, of course; unlike solar deities, they are consistently powerful, perhaps because of the associations with insanity. [[Myth/ClassicalMythology Selene]] fought against the Typhon, an [[EldritchAbomination evil monster]], to the point of scarring his freaking throat - not to mention Artemis, her late Antiquity replacement, who was infamous for her violence. [[Myth/NorseMythology Máni]] battles nightly against wolves. [[Myth/EgyptianMythology Khonsu]] is so violent that many invocations are about him killing the enemies of the pharaoh. [[Myth/MesopotamianMythology Sin]] is basically one of the greatest authorities among the gods, above Shamash the Sun.

[[folder:Tabletop Games]]
* Actively used in ''TabletopGame/ForgottenRealms'' with the goddess Selune-the oldest deity in existence (barring her evil twin), and extremely difficult to get a handle on in regards to her actual portfolio, which changes like the moon. Specifically the goddess of lycanthropes and women, but also encompasses divination, travelling, questing, tolerance, female spellcasters...
* In ''TabletopGame/MagicTheGathering'', magic associated with the Moon is usually either red (chaos) or blue (intellect). Depending on the setting, the local Moon might be of other colours, like white (order) and black (ambition), such as in Kamigawa (where it is blue and black) and the new Innistrad setting (where the Moon empowers both the local white flavoured church and the green and red werewolves, as well as a blue Planeswalker, though she is from Kamigawa). The moon of Innistrad is a truly otherworldly thing, being a potent source of mana that can induce transformations. A shard of it was once used to create the Helvault, a nigh unbreakable prison for demons. The moon itself [[spoiler:eventually becomes the prison for the Eldrazi Titan Emrakul.]]
* In the ''Literature/{{Dragonlance}}'' setting, arcane magic is governed by the three moons Solinari, Lunitari, and Nuitari (and the deities of the same names). Solinari is silver, Lunitari is red and Nuitari is [[WeirdMoon black]]. The last governs evil magic, and is, for obvious reasons, really hard to see.
* ''TabletopGame/WerewolfTheForsaken'':
** Luna, the mother of all werewolves, gets similar treatment. "Ever-Shifting Luna" is a more polite way of saying "Bitch ''crazy''." For instance, she has spirits, known as the Lunes, who oversee each of the [[{{Splat}} auspices]] and dispense wisdom to the Forsaken. The reason no werewolves ever try to make one a pack totem is because continued exposure to them can drive a werewolf insane.
** Then there's what the moon phase does for werewolves. Like in [[TabletopGame/WerewolfTheApocalypse the predecessor game]], a werewolf's phase of the moon (the one they were born under in the old game, the one they first change under in the new game) determines their basic role in werewolf society. Full moons are warriors, gibbous moons are bards and prophets, half moons are judges, crescent moons are shamans, and new moons are tricksters and rogues.
** ''[[TabletopGame/WerewolfTheApocalypse Apocalypse]]'' makes it clear that the Garou's Rage - the anger and fury that makes them capable of superhuman acts in combat and [[NiceJobBreakingItHero has probably resulted in a few of their greatest mistakes over the millennia]] - is a gift from Luna. Those who pissed her off, like the Nuwisha (werecoyotes), don't get the same benefit.
* ''TabletopGame/ChangelingTheLost'' gets in on it too. There's a Contract that Changelings can forge with the moon that revolves around madness; from sensing it with a glance to inducing it in whole crowds of people at once. And if you're a Darkling of the Moonborn kith, you have a spiritual connection to the moon that lets you drive people insane with a touch. Of course, you get zapped with a lesser version of that madness youself when you use it.
* ''TabletopGame/{{Exalted}}'' gives similar treatment to Luna, specifically how her chosen, the Lunar Exalted, regard her. Like all Exalted, Lunars accrue [[SanitySlippage Limit]] if they go against their guiding Virtues; however, they ''also'' gain Limit whenever the full moon's in the sky. Instead of realizing there may be some external reason for their [[HeroicBSOD occasional crazy rampages]], they just ascribe it to Luna being chaotic like that.
** And as in ''Werewolf'', a Lunar's role is linked to a phase of the moon; here, however, it's chosen by the Lunar, as they lost the inherent assignation of Caste when the Lunars as a whole fled into [[RealityIsOutToLunch the Wyld]] after the Usurpation. Those that aren't marked are the Casteless, whose Caste abilities shift with the moon and bear the risk of becoming [[BodyHorror Chimerae]]. The other three positions are Full Moon (warriors), Changing Moon (tricksters and diplomats), and No Moon (sorcerers and scholars); there used to be five Castes, but again, the Wyld screwed with that.
* ''TabletopGame/RuneQuest'' has Lunes, which are basically "Moon Elementals". Their touch causes madness.
** Then there's the Lunar Empire, with their Red Moon, who worship the Moon Goddess. Unlike most examples, though, the Goddess and the Empire are both completely evil.
* ''TabletopGame/DungeonsAndDragons'' 3.5 had a monster called Moon Rats. They are perfectly ordinary rats most of the time, but when exposed to the full moon they become intelligent, organized, and ''evil''. They're also very, very patient - don't think you're safe if they don't do anything of note on a full moon, because they're willing to make plans that take ''dozens'' of them to come full flower.
* ''TabletopGame/YuGiOh'' has Bujin Arasuda and Bujintei Tsukuyomi, as they are based off the Shinto moon god, Tsukiyomi.
* ''TabletopGame/BleakWorld'' has werewolves, obviously, but it also has the Host of Moon. The Host of Moon is the TokenGoodTeammate for the Hosts, a race of EldritchAbomination that empower witches, unlike most hosts, the moon gives power to witches who have consensual sex. For comparison the other hosts demand that you: [[ImAHumanitarian eat corpses of the fresh dead]], KillItWithFire, conduct HumanSacrifice, or kill republicans and industrialists.

[[folder:Video Games]]
* ''VideoGame/{{Okami}}'':
** Yumigami is a [[MoonRabbit rabbit god]] who gives you the power of Crescent, allowing you to change day to night. [[NotCompletelyUseless It's rarely useful]]. Certain events can only happen at night, and one boss allows it to ''somehow'' be used as an attack.
** There are Mr. and Mrs. Cutter, two crow {{tengu}} who disguise themselves as human. Mrs. Cutter specifically says that during the full moon their kind gets too excited for them to move outside without exposing themselves.
** Yami, the final boss is meant to represent the cold and lifeless moon in contrast to Amaterasu, the sun goddess.
* ''VideoGame/{{Touhou}}'':
** In ''Imperishable Night'', if you reach the "true" moon, the BigBad reveals that [[spoiler:"pure" moonbeams can drive humans insane. In one of Remilia and Sakuya's [[MultipleEndings endings]], it drives all the ''non''-human characters insane.]]
** [[MoonRabbit Reisen Udongein Inaba]], one of the said BigBad's servants, has the literal power to drive people crazy with nothing more than a [[RedEyesTakeWarning glance]]. Ironically, and fortunately, she's one of the most sane characters in [[MagicalLand Gensokyo]], although that's [[{{Cloudcuckooland}} not saying a lot]].
** In the Extra Mode of that game, a convenient full moon turns [[OurWerebeastsAreDifferent Keine Kamishirasawa]] into her hakutaku form, making her enough of a challenge to serve as an [[BonusBoss extra stage]] {{midboss}}.
** [[OurVampiresAreDifferent Remilia Scarlet]]'s powers are at their strongest during the Scarlet Moon, setting the stage for the final showdown of ''Embodiment of Scarlet Devil''.
** [[BlackMage Patchouli Knowledge]] has access to moon as one of the 7 elements she uses.
** [[{{Fairy}} Luna Child]] has the power to dampen sounds and create silence, and her power waxes when the moon is in the sky and wanes when it isn't.
** In ''Cage In Lunatic Runagate'', Yukari claims that the moon "gave birth to all {{youkai}}" by illuminating the night, and therefore creating the first shadows for humans to fear.
** [[{{Tanuki}} Mamizou Futatsuiwa]]'s [[VoluntaryShapeshifting transformation powers]] are strongest on the night of a full moon.
** Some of Rumia's spellcards are strongly related to the moon. ''Moon Sign: Moonlight Ray'' is implied to use the moon power to create ''lasers''.
** [[OurWerewolvesAreDifferent Kagerou Imaizumi]] is a werewolf capable of turning into an actual wolf when there's the full Moon. She also gets hairy, though.
** As the Moon's Hell is one of the three domains that Hecatia rules over, [[PhysicalGod Hecatia Lapislazuli]] and her minion [[{{Fairy}} Clownpiece]] possess spell cards where they harness the power of the moon... by literally summoning moons to smack the player with.
* The waxing and waning of the moon is a key gameplay feature in every ''Franchise/ShinMegamiTensei'' game. In general, the fuller the moon is, the more damage your attacks do, the more likely an accident is to occur during fusion, and the crazier the monsters act. During a full moon they're practically drunk off those moonbeams, which makes for entertaining conversation. There are also some abilities that are more or less effective depending on the phase of the moon. For pragmatic gameplay reasons, the moon cycles every couple of minutes rather than twenty nine days. Certain games have their own quirks:
** In ''VideoGame/Persona3'', the moon's phases have a stronger effect on the world (and gameplay) of ''Persona 3'' than in other Megaten games: during a Full Moon, Nyx's influence is so great it causes greater Shadows to manifest outside Tartarus, leading to special "extermination" missions (read: plot bosses) once every month. Full and New Moons also have an effect on the protagonist's psyche by affecting the Persona fusion processes. On the other hand, the game plays moon phases more realistically, not only taking roughly an entire in-game month for the moon to complete its cycle of phases but also using real lunar phase data from 2009 and 2010, the years that the game takes place.
** There's a period of time in ''VideoGame/ShinMegamiTenseiI'' where the main character would take damage during a full moon. This is because [[spoiler:of his psychic link to the Heroine, whose reincarnated self is currently undergoing torture from a demon that has invaded her mind. The full moon makes him feel her pain]]. This is solved [[spoiler:by rescuing her]].
** In ''VideoGame/DigitalDevilSaga'', there's a 50% chance during every new moon- [[CallARabbitASmeerp excuse us,]] MIN Solar Noise that your characters will be cured of any ailments that they are suffering from. Also, the selling price of Cells is at its highest during MAX Solar Noise. In the sequel, ''Digital Devil Saga 2'', there is a chance during 7/8 or MAX Solar Noise- sorry, ''Solar Data'' that you will enter battle in Berserk Form.
** You can guarantee that you get the best items from ''VideoGame/ShinMegamiTenseiIIINocturne's'' Mystical Chests by opening them during a full moon. The drop rate of Gems is also highest at this point.
** One Sub App in ''VideoGame/ShinMegamiTenseiStrangeJourney'', called "Lunatic", lets you speak to demons during the Full Moon (something otherwise impossible). Because they're drunk on the moonlight, they don't really know what they're saying, and will ask bizarre questions. You have a 50/50 chance of impressing them or pissing them off; impressing them can earn you rewards up to and including instantly recruiting them - this is one of the only two ways to recruit Dark demons without having to fuse them (The other being them joining on their own accord with yet another Sub App).
** Hecate is a moon goddess, so in her appearance as a boss in ''VideoGame/ShinMegamiTenseiII'' she is invulnerable as long as any part of the moon is visible - you have to wait until new moon to fight her.
* TheDragon Saïx in ''VideoGame/KingdomHeartsII''. He uses the ominous [[TitleDrop Kingdom Hearts]] floating over [[TheVeryDefinitelyFinalDungeon The World That Never Was]] as the focus of his powers, turning him from TheStoic into TheBerserker. The aforementioned MacGuffin is, for all intents and purposes, the moon of The World That Never Was; the theme of the world is entitled Sacred Moon, the city is draped in eternal night with the only light source being Kingdom Hearts..
* ''VideoGame/SkiesOfArcadia''. There are ''six'' moons, all powering different types of magic, all dropping meteorites onto the land below which everyone then uses to power just about everything. And that's not even counting their plot-critical role...
* In ''VideoGame/FinalFantasyIVTheAfterYears'', the phase of the moon affects the strength of various commands. For instance, when the moon is full, Physical attacks are weakened, while BlackMagic is stronger and WhiteMagic is unchanged.
* ''VideoGame/SecretOfMana'' has [[ExactlyWhatItSaysOnTheTin Luna]], whose Moon magic has many uses, from casting MP-stealing spells, berzerker like buffs, to [[BalefulPolymorph shape-changing your foes]]. Luna returns in ''VideoGame/SeikenDensetsu3''. Very few classes have access to any of Luna's spells, but Hawk's Wanderer class can cast all but one of them. The game also features the Moonlight Forest, home to the werewolf-like Beastmen (including Kevin, who can gain access to the one Moon spell that Hawk can't cast) who transform and get stronger at night. Unsurprisingly, the Moonlight Forest is where you eventually find Luna. The game also includes Dolan, the God-Beast of the Moon's power. He resembles a titanic werewolf-like creature, and can summon the moon to drain the party's health, cut their lives exactly in half, and grant himself the same berserker buffs as the party can cast.
* In ''VideoGame/SuikodenII'', one of the 27 True Runes is the Moon Rune, which [[ImmortalityInducer grants its wielder]] {{Immortality}}, at the cost of [[OurVampiresAreDifferent vampirism, of course.]] The original possessor of the Rune, [[MysteriousWaif Sierra Mikain,]] is said to be the oldest Vampire in existence. Scratch that, she IS the original vampire.
* ''Franchise/{{Pokemon}}'':
** There is a move called "Moonlight" that restores HP based on the weather, and in the games they debuted in, the time of day. In later games, it works identically to its counterpart, "Morning Sun," which results of a DubInducedPlotHole due to the clear skies field effect being translated as strong sunlight - Moonlight restores the most health when the sun is shining.
** According to the Pokédex, Eevee evolves into its Dark-type evolution Umbreon by exposure to the light of the moon, Lunatone becomes active during the full moon, and Cresselia extends its aurora during the quarter moon.
** There's also the Moon Stone, which allows a miscellaneous grouping of Pokémon to evolve. Only one of them, Clefairy, has any connections to the moon, being said to have originated on it.
** As of Generation VI, there is a Fairy-type move named "Moonblast", which is a beam made by borrowing power from the moon. It has the strongest base power of all Fairy-Type moves. Additionally, the previously-mentioned "Moonlight" has been changed to Fairy type.
** VideoGame/PokemonSunAndMoon introduces Lunala as emissary of the moon and mascot of Pokemon Moon.
* In ''VideoGame/ChronoCross'', Harle, the harlequin minion of villain Lynx, is revealed late in the game to be [[spoiler:the Dark Moon Dragon, created by the other six Dragons to be a servant of the Dragon God. She was created secretly so that she could release the seal on the other six Dragons and they would be able to merge once more into the Dragon God and unleash havoc on humans once again. She is eventually abandoned by them, as she did not merge with the other dragons]]. She's even named Tsukuyomi in the Japanese version, after the Japanese moon god. Her special attacks are all moon-based.
* AxCrazy Mitsunari of ''VideoGame/SengokuBasara'' has a moon theme going on in order to [[SolarAndLunar contrast with his nemesis]] Ieyasu. As an IaijutsuPractitioner, his slashes make crescent shapes and a moon appears in both his LimitBreak and his stage. The game often uses sun and moon imagery in order to symbolize the both and the final battle between them is represented as a solar eclipse.
* ''VideoGame/{{Wizard 101}}'' has the moon school in Celestia. It's powers involve [[VoluntaryShapeshifting shape-shifting]].
* ''VideoGame/LeagueOfLegends'' has Diana, the Scorn of the Moon. She's a melee assassin whose abilities revolve around using moonlight to attack her foes, making her the opposite of the sun-powered Leona. While she is a dark character, her goal is more tragic: for discovering the long-hidden secret moon cult of the Lunari, the sun-worshiping Solari almost executed her before she was endowed with her lunar powers and killed them.
* In ''VideoGame/FinalFantasyVIII'', the Lunar Cry not only drops a torrent of monsters onto the earth from the moon, it also changes terrestrial animals into monsters.
* In ''VideoGame/GoldenSunDarkDawn'', it's mentioned that beastmen become more aggressive at the full moon, which is why the public execution of prisoners will be at the full-moon festival-- it keeps them from fighting each other.
* ''VideoGame/{{Smite}}'', being based on various mythologies, includes two Mayan deities that drew power from the moon: Xbalanque (immortalized as the moon) and Awilix (''the'' actual Moon Goddess). Note that in spite of the Chinese deity Chang'e being titled 'Faerie of the Moon', she didn't exactly use moon power in battle, but rather... [[DanceBattler dances]].
* ''VideoGame/{{Dota 2}}'' features two Moon-based heroes: Mirana the Princess of the Moon and Luna the Moon Rider, they also play the RedOniBlueOni on both aspects of the Moon, Mirana plays the more calmer and soothing elements of the Moon, and her skills are more utility-based and even a global invisibility to her whole team. Luna plays more on the more psychotic and ruthless aspects of the Moon, being a BloodKnight whose skill set are more based on how much damage she can dish out.
* The moon in ''Videogame/TheLegendOfZeldaTheWindWaker'', for some reason, has an influence on the whereabouts of the GhostShip. There is even a map illustrating the islands the ship visits according to the lunar phase.
* The Moon plays an intricate part in the lore and themes of ''VideoGame/{{Bloodborne}}'', usually tying in with the themes of [[AllPeriodsArePMS blood and the beginnings, endings and repeating of cycles there-in]]. After the player kills Rom, the Vacuouse Spider, the blood moon descends, empowering the supernatural phenomena that plagues Yharnam and driving those already unstable at the beginning to fits of madness. This is best demonstrated with Sister Adella, who goes completely insane and tries to kill the player after killing Arianna [[ForWantOfANail for want of her blood]], or for Arianna who [[MysticalPregnancy suffers labor pains]] and then gives birth to immaculate Lovecraft slug-freak-baby. Also, the moon has a god in it.
* In the sequel to ''VideoGame/NelsonTethersPuzzleAgent'', Nelson discovers the work of a scientist who "proved" that penumbral eclipses cause insanity.
* [[LadyOfBlackMagic Umbra Witches]] from the ''{{VideoGame/Bayonetta}}'' series are at their strongest under the effects of a full moon. The titular character, for instance, is able to GravityScrew on walls and ceilings, running, jumping, and attacking on them as if she was on normal horizontal ground.
* ''VideoGame/BravelyDefault'' has [[GratuitousFrench Fort-Lune]], which is a planetary defense base ''on the Moon''. Its inhabitants are "Ba'al Busters", trained to fight {{Eldritch Abomination}}s, and party member Magnolia Arch is one of them.
* ''VideoGame/TheSims3'''s ''Supernatural'' expansion introduced, among other things, lunar cycles. The time of the full moon is when werewolves transform, witches and fairies are at the peak of their power, and Sims randomly turn into zombies.
* In ''Franchise/TheElderScrolls'' series, this is actually averted for [[OurWerebeastsAreDifferent were-creatures]]. While many in-universe believe the disease has connections to Nirn's [[AlienSky twin moons]], this is not the case. Depending on the exact form of lycanthropy present in the infected, they may [[InvoluntaryTransformation transform nightly, monthly]], or [[SuperMode voluntarily at any time]].
* Unlike the Power Stars of most ''Mario'' games, ''VideoGame/SuperMarioOdyssey'' has Mario collect Power Moons to power the Odyssey and enable him to travel further distances including to the Moon itself. [[spoiler:The Mushroom Kingdom still has Stars, but they're referred to as Moons as well.]]

* One of the many running gags in ''Webcomic/{{Sinfest}}'' is "Aah! Full moon! I'm turning into [whatever the character is most afraid of becoming]." As with most of ''Sinfest'''s running gags, the precise results can vary wildly--for instance, a [[HornyDevil demoness]] turns into a housewife.
* ''Webcomic/ChampionsOfFaraus'': Potions of Lunacy can only be made when in the light of the full moon, and the potion itself causes people to [[MushroomSamba hallucinate]] and go crazy.
* ''Webcomic/SoulSymphony'': The moon in Olivia's Soul World, where it is always night time, is the source of all energy and life. Supplies strange powers and mutations for Olivia's sidekick.
* ''Webcomic/CharbyTheVampirate'': Werewolves transform and loose their sanity during the full moon, though it appears to last for at least three nights for some of them. Menulis discovers that he still looses his mind during the full moon even if he takes a potion to turn himself human, it just means that on top of having little control of himself he no longer has the strength and healing benefits of being a werewolf until the potion wears off.

[[folder:Web Original]]
* #5 of ''Website/{{Cracked}}'''s [[http://www.cracked.com/article_20332_5-unrealistic-movie-cliches-that-are-scientifically-accurate.html 5 Unrealistic Movie Cliches That Are Scientifically Accurate]] explains moon fear as the result of a rise in lion attacks on the first few days after the full moon once the lions have become hungrier.

[[folder:Western Animation]]
* ''WesternAnimation/{{Futurama}}'' with the were-car. Even though the transformation had nothing to do with the moon, the were-cars howled/honked at it anyway.
* ''WesternAnimation/AvatarTheLastAirbender'': [[MakingASplash Waterbending]] is based on the Moon manipulating the tides. A Waterbender's abilities are at their peak when the moon is full, letting exceptionally powerful or skilled individuals use [[PeoplePuppets Bloodbending]]; conversely, [[spoiler:Waterbending ceases to work at all when the moon spirit is killed during the first season finale]].
* By ''WesternAnimation/TheLegendOfKorra'', the SequelSeries to ATLA, it's shown that a full moon is not required to pull off Bloodbending if the bender is powerful enough, [[spoiler:as shown by Tarrlok, Yakone and Amon]].
* ''WesternAnimation/{{Superjail}}'' has an interesting variation: In the pilot episode, The Warden decides to order bunny suits for all of the inmates. The Twins screw up his order, of course, and half of the suits are now wolf suits. The Warden decides to 'congratulate' The Twins while they're working out in the prison yard with the inmates (who are now clad in either bunny suits or wolf suits.) The Warden then proceeds to 'start the big show' and raises the full moon in the sky. The prisoners in the wolf suits suddenly start foaming at the mouth and transform into ''actual werewolves.''
* An episode of ''WesternAnimation/DextersLaboratory'' had Dexter experiencing a bad day. Dee Dee convinces him that it's because of the zodiac - the Moon is blocking him from his constellation. He solves it by pushing the Moon... and accidentally causing it to [[ColonyDrop fall into his city]].
* In the ''WesternAnimation/PhineasAndFerb'' episode "The Doof Side of the Moon", CardCarryingVillain Dr. Doofenshmirtz claims that although his own evil remains constant, the level of "background evil" waxes and wanes with the phases of the moon. Then it hits him why rotating the moon half way around has no effect on the lunar phases. [[CompletelyMissingThePoint And then reasons that he should have rotated the Sun instead]].
* Shikata, the {{Samurai}} BloodKnight mercenary [[KiAttacks ki-adept]] hired to kill Spider-Man in ''WesternAnimation/SpiderManTheNewAnimatedSeries'', gained [[{{Immortality}} indefinitely-prolonged youth]], KiAttacks and a HealingFactor by reflecting moonlight off her magic sword and onto her skin.
* Princess Luna from ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' is responsible for bringing out the night at dusk. A lot of her powers and those of her SuperpoweredEvilSide Nightmare Moon are based around lunacy: illusions, murderous madness, metamorphosis...
* In ''WesternAnimation/SilverHawks'', the light of the Moonstar of Limbo transforms Mon*Star (already a pretty imposing guy) into an even more powerful armored monster. The series begins when a burst of light from the Moonstar gives Mon*Star the strength to escape his prison. In one episode, a small piece of the Moonstar broke off and Mon*Star carried it around with him. This vastly amplified his power until the heroes got rid of it.
* Nighttime scenes in every episode of ''WesternAnimation/OverTheGardenWall'' feature a half-moon hanging in the sky, [[RuleOfSymbolism to symbolize how the Unknown is a place "in-between"]].

[[folder:Urban Legends]]
* It was once a common urban legend that people behave more rowdily under the full Moon, that people go crazy, that more crimes are committed, and that more people get hurt and go to the hospital. Many pseudoscienctific explanations were proposed to account for these supposed phenomena. Perhaps the rumors arose from the fact that, before the days of widespread, outdoor illumination like gas lights or street lights, outdoor activity that took place after dark, such as travel or parties, was always reserved for nights with a full moon -- the more active people are, the more opportunities would naturally arise for trouble. [[http://www.straightdope.com/classics/a2_337.html As it turns out, none of it is true]]; studies have failed to find any correlation between the phase of the Moon and human behavior. Even people involved in these jobs (police, ER docs, etc.) will think it's true, but it's just that they ''notice'' the crazy more during the full moon, not that there actually ''is'' more crazy.
* The practice of [[https://en.wikipedia.org/wiki/Lunaception Lunaception]]. Under this practice, [[AppealToNature humans had a menstrual cycle that was ''perfectly'' synched to the moon's phases before the advent of artificial lighting, therefore artificial lighting is responsible (or among the things responsible) for menstrual irregularities and infertility]]. To combat this, couples who are trying to conceive using this method will sleep in ''complete'' darkness (lights off, set bedtime, light-blocking curtains)...except for right around the full moon, when a small nightlight (or opening the curtains) is permitted. (Couples trying to conceive should have sex during this time.) In time, this will supposedly reset the woman's menstrual cycle to synch with the moon's phases, so she will ovulate with the full moon and (unless she gets pregnant) menstruate with the new moon. The practice can allegedly also be used to ''prevent'' pregnancy, by abstaining from sex during the week of the full moon. However, it is considered pseudoscience; none of these claims have been proven or verified in a scientific setting.

[[folder:Real Life]]
* On 27th October 2004, there was a total lunar eclipse that most of the United States were able to see in some way. That night, [[UsefulNotes/MajorLeagueBaseball the Boston Red Sox defeated the St. Louis Cardinals 3-0]] to complete a four-game sweep and win their first World Series since 1918, leading to mass celebrations in Boston.
* On June 15, 2011, there was a [[http://en.wikipedia.org/wiki/Hunter%27s_moon Blood moon]] combined with a [[http://www.watoday.com.au/wa-news/theres-a-blood-moon-on-the-rise-20110615-1g3js.html total lunar eclipse]] - timed perfectly with [[http://www.thestar.com/sports/hockey/article/1009755--vancouver-riots-i-m-ashamed-to-be-a-fan-right-now riots in Vancouver]] when [[UsefulNotes/NationalHockeyLeague the Canucks lost the Stanley Cup to the Bruins in a 0-4 upset.]]
* Being caused by the moon (and the sun), the tides do vary by moon phase. However, tides have no measurable influence on human being and most domestic animals. There ''are'' a few (specifically marine) animals that time their breeding with the tides or the phase of the moon, though.