History Main / DoesntKnowTheirOwnBirthday

* ''Webcomic/SlightlyDamned'': Buwaro dosen't know when his birthday is, on account of [[spoiler:him being orphaned before he hatched and [[InterspeciesAdoption Darius]] having stopped recording the date by the time he found him]].

* ''WesternAnimation/StevenUniverse'': In "So Many Birthdays", Steven finds out the other Crystals Gems NeverHadABirthdayParty. As Garnet and Pearl were born on another planet, Amethyst lived alone for a long time, and [[TimeAbyss all of them predate modern calendars anyway]], Steven just decides to act like the current date is all three of their birthdays.

* During the ''WesternAnimation/{{Futurama}}'' episode "Bender Should Not Be Allowed On Television", Cubert -- thinking how fun it'd be to have a birthday party -- realizes that he doesn't technically have a birthday on account of being [[RaisedInALab a clone of Professor Farnsworth]]. Fortunately for him, his folks decide to give him one anyway, either based on the day he was extracted from the cloning tank or the day his DNA was first extracted from the Professor (Cubert chooses the latter).

* [[Characters/XMen2010sMembers Honey Badger]] doesn't know her date of birth, being a clone. The Stepford Cuckoos have a similar predicament, but decided to arbitrarily pick a day based on the birth date of their favorite actor.

* A variation occurs in ''Series/FindingCarter''. The eponymous protagonist, a teenager who recently learned that her "mother" actually kidnapped her when she was a toddler, ''thought'' she knew her birthday, but the day that she had celebrated as her birthday for most of her life was actually the anniversary of the kidnapping.

* May occur if someone is born in a remote area that doesn't keep up-to-date on the current Gregorian date because it's not easy to contact or travel to. The date the paperwork is filed with the nearest administrative office can end up being used as the official birthdate, even if that's several months after the day the baby was actually born.

* ''ComicBook/UnstoppableWasp'': Nadia was raised in the [[ComicBook/BlackWidow Red Room]], and doesn't know when her birthday is. The Champions and Young Avengers end up throwing a birthday party for her when they hear she's never had one.

* In the ''Literature/{{American Girl|s Collection}}'' book ''Happy Birthday, Addy!'', Addy tells a neighbor she befriends that she and her parents don't know her birthday because she was born in slavery and slaves didn't have access to calendars; they only know that she was born in the spring. The neighbor then suggests (and Addy's parents agree) that she can pick a day around the right time of year and call it her birthday. At first, she has difficulty settling on what date she should pick, but then on April 9th they get the news that the North has won the Civil War, and Addy immediately knows that there could be no better date for her birthday than that one.

* [[Characters/XMen2010sMembers Honey Badger]] doesn't know her date of birth, being a clone. The [[ComicBook/StepfordCuckoos Stepford Cuckoos]] have a similar predicament, but decided to arbitrarily pick a day based on the birth date of their favorite actor.

* In ''Literature/ThePinballs'', Thomas J. doesn't know his birthday, since he was a DoorstopBaby and the authorities are still trying to figure out his real identity. Carlie tells him that he can share her birthday for the time being.

* Literature/AmericanGirlsCollection: In ''Happy Birthday, Addy!'', Addy tells a neighbor she befriends that she and her parents don't know her birthday because she was born in slavery and slaves didn't have access to calendars; they only know that she was born in the spring. The neighbor then suggests (and Addy's parents agree) that she can pick a day around the right time of year and call it her birthday. At first, she has difficulty settling on what date she should pick, but then on April 9th they get the news that the North has won the Civil War, and Addy immediately knows that there could be no better date for her birthday than that one.

* Literature/{{American Girls|Collection}}: In ''Happy Birthday, Addy!", Addy tells a neighbor she befriends that she and her parents don't know her birthday because she was born in slavery and slaves didn't have access to calendars; they only know that she was born in the spring. The neighbor then suggests (and Addy's parents agree) that she can pick a day around the right time of year and call it her birthday. At first, she has difficulty settling on what date she should pick, but then on April 9th they get the news that the North has won the Civil War, and Addy immediately knows that there could be no better date for her birthday than that one.

--> '''Tracy:''' I don't need a birthday 'cause I buy myself all the presents I need. And because of my drinking, they're often a surprise.

* On ''Series/30Rock'', Tracy doesn't know his birthday, and never had birthday parties as a child. Kenneth then gets Jenna to agree to share her birthday this year.

* On ''Series/{{30Rock}}'', Tracy doesn't know his birthday, and never had birthday parties as a child. Kenneth then gets Jenna to agree to share her birthday this year.
--> ''Tracy:'' I don't need a birthday 'cause I buy myself all the presents I need. And because of my drinking, they're often a surprise.

* Tenzing Norgay initially didn't know his birthday, he just knew it was in late May. After helping Sir Edmund Hillary climb Mt. Everest he decided to celebrate it on that day, May 29.

* ''WesternAnimation/PJMasks'': In the short "PJ Masks Surprise", the PJ Masks throw a birthday party for An Yu. Since she has been [[SealedGoodInACan trapped in the dragon gong]] for centuries, and hardly ever leaves Mystery Mountain, she doens't understand what a birthday is.