Internet, folk, and otaku holidays

[cidoku]

There really is a day for everything. I want you to think about your hobbies and media you enjoy and research if there are days that celebrate and honor your interests, important people or shows you like. Bonus points if you can find the history behind the holiday!

I'll start with some of my own, but I'll leave the ones most relevant to this forum for you to find:
* February 1 is Pretty Cure day, commemorating the day Futari Wa Pretty Cure, the first season of the franchise, first aired in 2004.
* February 4 is Puyo Puyo day because the numbers in the date 2/4 can be read as "pu" and "yo" in Japanese (a case of goroawase).
* March 14 is International Day of Mathematics because the date 3/14 has the first three digits of pi. March 14 is more commonly known as Pi Day, but all of mathematics is celebrated that day.
* International Astrology Day is observed on either March 20 or March 21, whenever the March equinox occurs that year, because that event marks the start of the astrological year, that is, when the Sun enters the first degree of Aries.

Maybe every day is worth celebrating. What else can you find?

Some interesting resources:
The Japanese Anniversary Association Wink wink
Touhou Calendar

[Blond]

I'll start with some of my own, but I'll leave the ones most relevant to this forum for you to find:
* February 1 is Pretty Cure day

Oh, cool. I have the same birthday as peak.

Here are my days to remember:

February 7, 1889 — Jonathan Joestar's death.
May 13, 1973 — The final episode of Ashita no Joe was published.
May 6, 2021 — Kentaro Miura's death.

And the last one:

March 2, 2018 — Billy Herrington's death.

To not end on such a sad note, I'd also like to remember April 25, 2008, the day Science Adventure was born, and August 4, 2025, as the day the best forum on the net was made.

[Amlux]

November 26th - Kasugi Maori's birthday
September 9th - Cirno Day
November 11th - Pocky Day
July 18th - KyoAni fire anniversary day of memorial (also my birthday)

[Maypews]

July 7th is Rena Ryuugu day, and it's periodically celebrated on 4chan though it seems to have declined in relevance since it's apex on 07/07/2007. It's mentioned that there was a lot of Rena spam on /a/ this day on third party sites, but I've been unable to find actual screencaps of the event. That said she's generally got a lot of sevens in her background, from being the mascot of 07th Expansion, to being born on 07/1967.

I did a little digging and it seems that her birthday is actually on July 28th, but I have no idea what the source on this is and can't find any first hand evidence of it being stated. If anyone knows where let me know, though that would be funny because it would mean her birthday is on the same day as another important day for us; Steins;Gate day, the fateful one in which Okabe first visits the Radio building.

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[cidoku]

Steins;Gate day, the fateful one in which Okabe first visits the Radio building.

Indeed: July 28 is Steins;Gate Day, and it's an official holiday according to the Japanese Anniversary Association. Another important Steins;Gate related day is August 13, when Okabe first has to face the effects of convergence.

July 7th is Rena Ryuugu day

You mentioned Higurashi, so I'll mention Umineko. The fanbase widely celebrates October 4 as Umineko Day, commemorating the start of the Rokkenjima Mass Murders. Some also include October 5, as the main events of Umineko take place in those two days.

Another day relevant to me is August 1, Mahjong Day. According to the Japanese Anniversary Association it was started in 2018 in Japan by a group of parlor owners to celebrate and promote the game; others say it was started by the WRC (World Riichi Championship). I'm not too sure, but it seems it was a Japanese idea. The day celebrates all variants, anyway, even if they're dumb (like American mahjong lmao).

[TheEvilShadoo]

September 19th - International Talk Like a Pirate Day: https://talklikeapiratecom.wpcomstaging.com
March 10th - The International Day of Awesomeness: https://dayofawesomeness.com
October 9th - Leif Erikson Day
January 25th - Opposite Day

[Maypews]

Happy Steins;Gate day to those who celebrate!

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[Yuuni Anno]

Happy Steins;Gate day to those who celebrate!
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First Try, barely even broke a sweat.

[TheEvilShadoo]

Happy Steins;Gate day to those who celebrate!
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Nyan nyan~!

[Steve]

I cheated