Cirno Day 

⑨ /⑨ /0⑨ , also known as ⑨ day, but more commonly used to refer to the day Cirno became supreme overlord of our planet, solely because she is THE STRONGEST IN ALL OF Gensokyo. CIRNO IS OUR OVERLORD. HAIL CIRNO.

Touhou fan #1: ⑨ /⑨ /0⑨ was the greatest day in history.
Touhou fan #2: Yeah, ⑨/ ⑨ /10 and ⑨ /⑨ /11 can never compare. Although they're pretty nice, the anniversary of our strongest overlord is quite a ⑨ ish event, you know.
Touhou fan #3: Happy Cirno Day, bakas! *spams danmaku*
Everyone: *dies* @_@

Cirno Day by Daiyousei September 10, 2011

Cirno Day 

Stefan's Birthday.

haha ⑨

Heh, Cirno Day and me birthday are ⑨/⑨/x⑨. Hehe ⑨ funni

Cirno Day by Strepto November 19, 2019

Cirno Day 

Cirno Day is on September ⑨ of each year. This is because September is the ⑨th month and ⑨ is Cirno's number (from a joke in the Touhou community being that "nine" means "baka" which means "idiot". Cirno was also labeled as ⑨ on a Touhou game manual.).

Cirno Day celebrations include playing "Become Fumo" on Roblox, or going out at midnight and plastering pictures of Cirno all over your town. The second option is more obtrusive than celebratory, but it is still an option.

Cirno Day is celebrated on ⑨/⑨ each year, and the strongest year would be one that ends in ⑨.

Cirno Day by Nobody reads this except you- August 20, 2024