Fandom Holidays

Last Updated on 6 July 2025

Here is a list of holidays related to different fandoms. If you’re a fan and know of more that I should add, please suggestions@listobsession.com.

Jan 2 – Science Fiction Day
Jan 3 – J.R.R. Tolkien Day
Jan 13 – Rubber Ducky Day
Jan 17 – Popeye Day
Jan 28 – Lego Day
Feb 1 – G.I. Joe Day
Feb 23 – Pinocchio Day
Feb 27 – Pokémon Day
Feb 29 – Superman’s Birthday
Mar 4 – Toy Soldier Day
Mar 7 – Sock Monkey Day
Mar 8 – Retro Video Game Day
Mar 9 – Barbie Day
Mar 10 – Mario Day
Mar 13 – Ken Doll Day
Mar 20 – Hufflepuff Pride Day
Mar 20 – Won’t You Be My Neighbor Day
Mar 21 – Slytherin Pride Day
Mar 22 – Gryffindor Pride Day
Mar 23 – Ravenclaw Pride Day
Mar 25 – Tolkien Reading Day
Mar 26 – Live Long and Prosper Day
Mar 31 – Crayon Day
Apr 3 – Fish Fingers and Custard Day
Apr 5 – Star Trek First Contact Day
Apr 9 – Jumbo the Elephant Day
Apr 9 – Unicorn Day
Apr 15 – Anime Day
Apr 18 – Superman Comic Day
Apr 18 – World Marbles Day
Apr 19 – Sylvester the Cat Day
Apr 23 – Impossible Astronaut Day
Apr 24 – International Firefly Day
Apr 26 – Alien Day
Apr 27 – Woody Woodpecker Day
Apr 28 – Superhero Day
Apr 30 – Bugs Bunny Day
Apr 30 – Mr. Potato Head Day
May 1 – Mother Goose Day
May 2 – Harry Potter Battle of Hogwarts Day
May 4 – Intergalactic Star Wars Day
May 7 – Black Spot Day
May 11 – Twilight Zone Day
May 13 – Leprechaun Day
May 21 – Talk Like Yoda Day
May 22 – Sherlock Holmes Day
May 22 – World Goth Day
May 25 – Geek Pride Day
May 26 – World Dracula Day
Jun 1 – Oscar the Grouch Day
Jun 1 – World Outlander Day
Jun 3 – Wonder Woman Day
Jun 6 – Yo-Yo Day
Jun 8 – Ghostbusters Day
Jun 9 – Donald Duck Day
Jun 12 – Raggedy Ann and Andy Day
Jun 12 – Superman Day
Jun 19 – Garfield the Cat Day
Jun 21 – Mermaid Day
Jun 25 – Smurfs Day
Jun 26 – 626 Day (Lilo & Stitch Day)
Jul 4 – Alice in Wonderland Day
Jul 10 – Teddy Bear Picnic Day
Jul 17 – Disneyland Day
Jul 17 – World Emoji Day
Jul 27 – Dungeons & Dragons Day
Jul 31 – International Harry Potter Day
Aug 1 – Spiderman Day
Aug 6 – Sailor Moon Day
Aug 10 – Snoopy’s Birthday
Aug 12 – Vinyl Record Day
Aug 28 – Power Rangers Day
Aug 30 – Slinky Day
Sep 8 – Star Trek Day
Sep 13 – Scooby-Doo Day
Sep 13 – Supernatural Day
Sep 13 – Twilighters Day
Sep 16 – Play-doh Day
Sep 21 – Batman Day
Sep 22 – Hobbit Day
Sep 25 – Comic Book Day
Sep 30 – Thunderbirds Day
Oct 1 – Willy Wonka Day
Oct 3 – Mean Girls Day
Oct 6 – Mad Hatter Day
Oct 12 – Harry Potter Book Day
Oct 15 – I Love Lucy Day
Oct 21 – Back to the Future Day
Nov 1 – Hello Kitty Day
Nov 2 – Cookie Monster Day
Nov 10 – Sesame Street Day
Nov 18 – Mickey Mouse Day
Nov 18 – Minnie Mouse Day
Nov 18 – Princess Day
Nov 23 – Doctor Who Day
Dec 5 – Disney Day
Dec 11 – Fandom Day
Dec 28 – Marvel Day