Quite simple. Make the post to establish the timestamp, then check to see the seconds time of your post is. Then, edit your post to state what you got and your reaction.
Oh, and don't take the "spend the day" part too literally.
00 - Watching movies together
01 - Playing hide-and-seek
02 - Beating up the avatar
03 - Getting beaten up by the avatar
04 - Pranking neighbors
05 - Hugging
06 - Sailing the seas
07 - Eating sandwiches
08 - Playing chess
09 - Committing arson
10 - Golfing
11 - Clothes shopping
12 - Playing Minecraft
13 - Strip poker
14 - Handcuffed together
15 - Shoving the avatar into a meat grinder
16 - Drinking beer
17 - Being sick with the flu
18 - Snowball fight
19 - Stealing cars
20 - Solving mysteries
21 - Having tea
22 - Locked in jail
23 - Playing baseball
24 - Having a rap battle
25 - Going to the aquarium
26 - Skydiving
27 - Being the campaign manager for the avatar's political career
28 - Being stuck in a broken elevator
29 - Crossdressing
30 - Making out
31 - Being each other's wingmate on a double date
32 - Swallowed by a whale
33 - Fencing
34 - Going to a basketball game
35 - Running a lemonade stand
36 - Playing on a beach
37 - Trick-or-treating
38 - Drag racing
39 - Sleeping together (literal, nonsexual sense)
40 - Having a really nasty argument
41 - Babysitting a child
42 - Time travelled to the past
43 - Time travelled to the future
44 - Married for a day
45 - Running away from Godzilla
46 - Screwing in a lightbulb
47 - Falling into a ravine
48 - Lost in outer space
49 - Swimming in a pool
50 - Freaky Friday Flipped
51 - Reverted to 4 years old
52 - Having a romantic spaghetti dinner
53 - Attending a Broadway production
54 - Fighting crime with superpowers
55 - Dealing with poison ivy
56 - Eating pizza
57 - Playing video games
58 - Showering together
59 - Breaking into a bank
I got 32, so I'd spend the day with the above theoretical avatar swallowed by a whale. Yuck.
Edited by Parable on Aug 10th 2023 at 7:25:08 AM
Fabienne Growly.
Oh! Okay! I'm more than happy with this. 
edited 27th Feb '17 5:12:27 PM by DrNoPuma
He may be a giant, nightmarish brute, but like all villains in this series,he sure can sing.
Mila
Taranza
Ripoff Spiderman and I are going off to fight crime. Neat!
edited 27th Feb '17 5:19:26 PM by Cabe_Bedlam
I need to update these things more often
With Leorina...
...this is, uhh... okay, I... guess?
edited 2nd Mar '17 8:11:12 AM by anza_sb
Twitter/Instagram: anzasquiddles. Deviantart: anzahanifathallah.
How sweet it is
Darwin...
Not sure if he's familiar with Broadway, but hey, at least it's going to be fun.
edited 2nd Mar '17 8:17:03 AM by Berrenta
she/her | TRS needs your help! | Contributor of Trope Report
Lucina and Morgan.
All three of us? Okay.
edited 3rd Mar '17 1:21:28 PM by BioSafety
Dusty the Mighty
With Pit...
Hey, this could be fun.
edited 5th Mar '17 10:41:57 AM by kablammin45
"Hey, gimme a minute to get to know everyone, 'kay, Brainy?" "Of course, but please allow me to get a word in, too, bzz."
Mila
With Gazelle
She can definitely outrun me. Then again, if we're in Zootopia wouldn't he be just another citizen?
edited 3rd Mar '17 4:00:42 PM by Cabe_Bedlam
I need to update these things more often
Dusty the Mighty
With the King of Sorrow....
Granted, there could have been worse numbers, but hasn't this guy been through enough already?
edited 5th Mar '17 10:43:04 AM by kablammin45
"Hey, gimme a minute to get to know everyone, 'kay, Brainy?" "Of course, but please allow me to get a word in, too, bzz."
PINNACLE OF MAN
Tamatoa. Jesus Christ his teeth are awful.
Hope you like Jaws!
edited 5th Mar '17 10:45:23 AM by arcada188
I am the most suitable partner for Gaia. I have some bad news. You will not make it to Eden. This is the end of your journey.Grown-up Mannish Child.
I wonder how he'll use his Stand for this.
edited 5th Mar '17 6:15:43 PM by DrNoPuma
He may be a giant, nightmarish brute, but like all villains in this series,he sure can sing.
With Yooka and Laylee...
Cool. What do you guys wanna see? Comedy?
edited 5th Mar '17 7:47:18 PM by TheGreatUnknown
Mila
With Knockoff Nicole
I don't know much about her, but she seems to have a quick temper. I somehow doubt that we'll last long at sea.
edited 5th Mar '17 11:14:42 PM by Cabe_Bedlam
I need to update these things more often
Jer gets all the girls
With Ishra?
...Well I feel like this could've gone worse.
Oh, wait, I'm claustrophobic ain't I?
HELP!
edited 5th Mar '17 11:20:08 PM by Murataku
Everybody's all "Jerry's old and feeble" till they see him run down a skyscraper and hijack a helicopter mid-flight.
Blitzy....
Harry!
That was close. He'd be a better babysitter if he didn't have that gun, though.
edited 6th Mar '17 2:58:06 PM by CyberController
Just made a server on discord.Come join me.
Playing minecraft with a couple of young kids! SURE! So what if one of them is undead?
edited 7th Mar '17 8:54:48 AM by paradisedj32
Dusty the Mighty
So....with the Dip-mobile.
Does that just mean that I'm sleeping inside it?
edited 12th Mar '17 11:17:27 AM by kablammin45
"Hey, gimme a minute to get to know everyone, 'kay, Brainy?" "Of course, but please allow me to get a word in, too, bzz."
We Are With You Zack Snyder
With Feraligatr
Just got tired after fighting rival Pokemon trainers so we fell asleep.
note
edited 12th Mar '17 11:24:28 AM by Halberdier17
Batman Ninja more like Batman's Bizarre Adventure
Dusty the Mighty
With...whoever she is?
She doesn't seem like the type of person who would eat pizza, but maybe she'll be pleasantly surprised.
edited 28th Mar '17 4:39:48 PM by kablammin45
"Hey, gimme a minute to get to know everyone, 'kay, Brainy?" "Of course, but please allow me to get a word in, too, bzz."
How sweet it is
With a snake...
Not sure if it can swim...
edited 28th Mar '17 9:23:03 PM by Berrenta
she/her | TRS needs your help! | Contributor of Trope Report
Jer gets all the girls
Legendary Pokemon!
This isn't fair, it's not even wearing any clothes to strip!
edited 28th Mar '17 10:48:46 PM by Murataku
Everybody's all "Jerry's old and feeble" till they see him run down a skyscraper and hijack a helicopter mid-flight.
With the Nostalgia Critic...
...committing arson. Uh... what?
edited 29th Mar '17 6:12:48 AM by anza_sb
Twitter/Instagram: anzasquiddles. Deviantart: anzahanifathallah.
Dusty the Mighty
With '17 Cogsworth...
Doesn't seem too unreasonable, though people are probably going to wonder why I brought a clock into the theater with me.
edited 29th Mar '17 7:30:38 AM by kablammin45
"Hey, gimme a minute to get to know everyone, 'kay, Brainy?" "Of course, but please allow me to get a word in, too, bzz."
How sweet it is
So I'm with my chosen starter's final evolution, Primarina...
Most awkward hide and seek ever.
edited 2nd Apr '17 9:41:54 PM by Berrenta
she/her | TRS needs your help! | Contributor of Trope Report
This Team Skull grunt!
I guess that makes sense in Alola. Sounds pleasant, good company too.
edited 3rd Apr '17 5:53:51 PM by TheGreatUnknown
Gazelle! Whoo!
Well, I'm disappointed it wasn't one second later, but it's probably for the best. The paparazzi are gonna hound me about it anyway.
edited 27th Feb '17 5:08:10 PM by TheGreatUnknown