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
watermelon
Spending the day with Mercy and Medic...
Well, hopefully they can patch me up if I over-exert myself. Not that there's much chance of that...
edited 6th Feb '17 12:11:30 AM by Sazandora
current jam | avi
see you, space cowboy.
Chilling with Ruby.
Wait, my Earth's past or hers?
Because if it's hers then I'm fucked.
edited 9th Feb '17 11:10:12 AM by BaconZorp
Long live the New Bev.
Georgia.
Okay, but none of this was my idea.
edited 9th Feb '17 11:12:49 AM by DrNoPuma
He may be a giant, nightmarish brute, but like all villains in this series,he sure can sing.
We Are With You Zack Snyder
Maxwell
We both fell asleep; some villain knocked us out.
edited 9th Feb '17 11:23:07 AM by Halberdier17
Batman Ninja more like Batman's Bizarre Adventure
La Lézarde
Me and Cassandra Cain....
I don't think she'll enjoy this, especially since I was a big-time Bratty Half-Pint at that age.
edited 9th Feb '17 11:34:30 AM by kablammin45
"Pardon me, that extremely loud and extremely deep voice you may have just heard. It was me. Oh, it is such a long story..."
watermelon
Clefairy...
We'll, um, "Imprison" those crooks!
edited 9th Feb '17 12:25:02 PM by Sazandora
current jam | avi
With Ruby! Yeeeeh
Sandwiches? Not cookies? 
edited 9th Feb '17 7:59:01 PM by anza_sb
Twitter/Instagram: anzasquiddles. Deviantart: anzahanifathallah.
I've got the spirit but lose the feeling
Hanging out with Sans.
It's going tibia-wkward. -rimshot-
edited 9th Feb '17 8:23:41 PM by GrafVonTirol
1001 Albums You Must Hear Before You Die (all editions) progress: 436/1089 (40.04%)
Jer gets all the girls
Ages of Empires awesome!
Now, this is odd, seeing as there are no in-game days or nights, and nobody sleeps. Maybe we're all stuffed in the one sentry tower or something? Who knows.
edited 10th Feb '17 12:34:35 AM by Murataku
Everybody's all "Jerry's old and feeble" till they see him run down a skyscraper and hijack a helicopter mid-flight.
watermelon
Plastic Man...
Okay then. I expect this to be kinda uneventful though.
edited 10th Feb '17 2:51:34 AM by Sazandora
current jam | avi
I've got the spirit but lose the feeling
Ruby.
Hey, nothing like relaxing in front of the screen for a while...
edited 10th Feb '17 4:53:08 AM by GrafVonTirol
1001 Albums You Must Hear Before You Die (all editions) progress: 436/1089 (40.04%)
see you, space cowboy.
Gustaf! What a sexy name!
This is too badass.
edited 10th Feb '17 6:17:10 AM by BaconZorp
Long live the New Bev.
Don't step on the flowers.
Me and Georgia...
I'm thinking this robbery will fail badly.
edited 10th Feb '17 6:18:26 AM by Revaryk
"YOU SHALL FEEL THE FLOWER'S WRATH"
With Marisa
I guess she can still use Master Spark as a kid, huh. Sorry, I mean bleh hueh hueh phbbbbbt
I can't remember what I was like as a 4-year-old, so eh ¯\_(ツ)_/¯
![[down]](https://static.tvtropes.org/pmwiki/pub/smiles/arrow_down.png "[down]"){kind=icon}
talk about a matri-bony. 
edited 10th Feb '17 7:19:51 AM by anza_sb
Twitter/Instagram: anzasquiddles. Deviantart: anzahanifathallah.
see you, space cowboy.
Sans. Fear us, pun-haters! We're going to ruin your day!
Aw, dammit...
"... This game sucks..."
edited 10th Feb '17 8:25:17 AM by BaconZorp
Long live the New Bev.Georgia!
Sorry, I don't think there's a way to cook and eat the squids.
edited 10th Feb '17 8:19:16 AM by DrNoPuma
He may be a giant, nightmarish brute, but like all villains in this series,he sure can sing.
With Napstablook!
Uh—tell me you can get us both out of this with your magic! And no, I don't care if you're not really feeling it!
edited 10th Feb '17 6:34:23 PM by TheGreatUnknown
Fly Air Madeline
The shopkeeper from Snowdin Town.
Golfing sounds good.
edited 10th Feb '17 10:36:34 PM by lewattoo
"I'll show you all of Paris, I'll take you on a tour, we'll go up and up and up so high they'll long for an encore!"
Mila
With the child.
Oh dear. I was told no touching the child, but I guess I didn't listen. I can only hope I stopped an aspiring Genocide route.
edited 10th Feb '17 11:28:03 PM by Cabe_Bedlam
I need to update these things more oftenKlonoa!
Any Moos nearby that you can throw at him?
edited 11th Feb '17 8:13:27 AM by DrNoPuma
He may be a giant, nightmarish brute, but like all villains in this series,he sure can sing.
La Lézarde
A Cat Tail from the first Plants vs Zombies game....
It can get the flu? It's technically a plant, isn't it?
edited 11th Feb '17 4:09:05 PM by kablammin45
"Pardon me, that extremely loud and extremely deep voice you may have just heard. It was me. Oh, it is such a long story..."
Mila
A friendly dragon ... with hair.
He'll ... keep me warm I guess? And also probably take up the entire bed, not to mention break it in half.
edited 11th Feb '17 7:12:14 PM by Cabe_Bedlam
I need to update these things more often
Klonoa...
Oh. That's cool. No using those ears, though, that's cheating.
She is a Pandaren.
edited 11th Feb '17 11:31:20 PM by TheGreatUnknown
With the Dog/Cat/Bear person.
I hope they don't try to chase the balls. if they are a dog.
edited 11th Feb '17 11:30:23 PM by TropesForever
The detective and his trigger-happy buddy. Oh boy.
Sam seems like a nice enough guy to kick back and relax with over some team. I'd be more worried about Max, however.
edited 5th Feb '17 6:06:59 PM by DarkDestruction
Don't stop, just proceed, 'cause this is what you need-proceed, just proceed, 'cause this is what you need!