Not Funny Didn't Laugh Day

Not Funny Didn't Laugh Day was a channel event that took place on September 10, 2019 (9/10/19), in reference to the "9 + 10 = 21" meme.

Summary
The event was mostly dedicated to shitposting. Rips uploaded heavily featured the "9 + 10 = 21" meme and the related meme "Awesome, He Finally..." as jokes.

Timeline

 * Learn (Alpha Mix) - Baldi's Basics in Education and Learning
 * Jingle: Not Pleasant Food - Tomodachi Collection
 * Trailer Theme - Five Nights at Freddy's 3
 * Title Theme (Subor Dendy Clone) - Family Basic
 * The Sky - The Legend of Zelda: Skyward Sword
 * Main Theme - 21 Black Jack
 * Jingle: Normal Response (Extended Version) - Tomodachi Collection
 * Your Team Won (Classic Ver.) - Team Fortress 2
 * Present #2 - MOTHER 3
 * Kamen Rider Zero-One Rising Hopper Transformation - Kamen Rider: City Wars
 * Circus 3 - Madagascar 3: The Video Game
 * Title Theme - Mario Is Missing! (SNES)
 * Konga Conga Kappa (King Conga) (Unused Version) - Crypt of the NecroDancer
 * Main Menu - Five Nights at Pingas 4
 * Title Theme (Alternative Mix) - Mario Is Missing! (SNES)
 * Done In - Kirby Star Allies
 * Circus - Five Nights at Freddy's
 * Super Mario Bros. Music - Game Over
 * Menu - Cooking Mama
 * Main Theme - Ninety-Nine Nights II
 * Intro (Alpha Mix) - Hotel Mario
 * 20 Questions - GamePigeon
 * Emote: Dance Moves (Funny Mix) - Fortnite
 * BGM 09 - Elf: The Movie
 * Main Theme - Peppa Pig: The Game
 * Grass Land (PAL Version) - Super Mario Bros. 3
 * Battle Win - Sonic Chronicles: The Dark Brotherhood
 * Funky Groove Makes U Hot!? ...for Options - Sonic Adventure
 * Close Your Eyes, Sugar - MOTHER 3
 * An Unexpected Answer! - Wheel of Fortune
 * Tutorial - The Town with No Name
 * Freezeezy Peak (Rare Replay) - Banjo-Kazooie
 * Jingle: Kill Confirmed - Bird Hunter 2003: Legendary Hunting
 * Anbroids V2.0 (Flash Version) - Hiveswap
 * Run! (Beta Mix) - Undertale
 * Laugh! Be Happy! (Alternate Mix) - MOTHER 3
 * PictoChat - Super Smash Bros. UItimate
 * Main Theme - Mortal Kombat
 * Main Menu - Five Nights at Freddy's 3
 * Main Theme (Beta Mix) - Tetris 99
 * Title Theme & Ending (Short Version) - The Flintstones: The Rescue of Dino & Hoppy
 * mus_zzz_c - Undertale
 * Emote: Dance Moves (Nintendo Switch Version) - Fortnite
 * Fanfare (from Rose of Winter) - Deltarune
 * Bamboo Boogaloo II (Bamboo Creek) - The Messenger
 * Mario Golf! - Mario Golf
 * Stal (Beta Mix) - Minecraft
 * Emote: Phone It In - Fortnite
 * No Way? No Way! - CrazySonic
 * Cutscene Theme 1 - The Incredible Crash Dummies
 * Sex - Steve Harvey

Trivia

 * Although the event occured on 9/10 and can be explained without referencing 9/11, its similarity to 9/11 2017's "7 Grand Dad Fusion Collab" has caused fans to associate it with the other 9/11 events on the channel. Additionally, the rip "Kirby Dance B - Kirby: Canvas Curse" uploaded the very next day contains a roundabout reference to 9/11, implying the SiIva managers were aware of the event's proximity to the date.