10/7 is Rumia Day! Is that so? #十月七日はそーなのかーの日 (p|t) 10 (十) looks like Rumia's iconic t-pose. If read instead as 十(So), with 7(Na) it's part of her "catchphrase" "So nano ka?"

10/7 is Rumia Day! Is that so? #十月七日はそーなのかーの日 (p|t) 10 (十) looks like Rumia's iconic t-pose. If read instead as 十(So), with 7(Na) it's part of her "catchphrase" "So nano ka?"

10/6 is the Third Tenshi Day! #10月6日はてんこの日に間に合わなかった人の日 (p|t) Goroawase: 10(Ten)6(Mu)=Ten Musume (Heaven Girl)

10/5 is Tenko Day! #10月5日はてんこの日 (p|t) #10月5日は天子の日 (p|t) #天子の日 (p|t) Goroawase: 10(Ten)5(ko)

Upcoming: 10/6: Third Tenshi Day 10/7: Rumia Day 10/9: Tengu Day, Tenkyuu Day, Akyuu Day 10/10: Super Ichirin Day, Chen Day, Ten Desires Day 10/12: Okina Day 10/15: MariAli Day 10/16: ReiMariAli Day

10/4 is Toyohime Day! #10月4日は綿月豊姫の日 (p|t) Goroawase: 10(to)4(yo)

10/4 is Tenshi Day! #10月4日は天子の日 (p|t) #天子の日 (p|t) Goroawase: 10(Ten)4(shi)

10/4 is Teruyo Day! #10月4日はてるよの日 (p|t) Goroawase: "Teruyo" is like 10(Ten/To)4(yo)

10/03 is Doremy Day! #10月03日はドレミーの日 (p|t) #10月3日はドレミーの日 (p|t) #10月3日はドレミー・スイートの日 (p|t) Goroawase: 10(Do)0(rei)3(mi)

10/1 is World Sake Day, and Yuugi Day! #10月1日は星熊勇儀日 (p|t) 10/1 is World Sake Day, fitting for a hard-drinking Oni

9/30 is the Anniversary of Kourindou! #9月30日は香霖堂発売記念日 (p|t) Anniversary of the publication of Touhou Kourindou

9/30 is Kurumi Day! #9月30日はくるみの日 (p|t) 9/30 is Walnut Day, as 9(Ku)3(mi) is like "Kurumi", and the digit 0 resembles a round walnut

Upcoming: 9/30: Kurumi Day, Kourindou Anniversary 10/1: Yuugi Day 10/3: Doremy Day 10/4: Teruyo Day, Tenshi Day, Toyohime Day 10/5: Tenko Day 10/6: Third Tenshi Day 10/7: Rumia Day 10/9: Tengu Day, Tenkyuu Day, Akyuu Day 10/10: Super Ichirin Day, Chen Day, Ten Desires Day 10/12: Okina Day

Awoo! 9/23 is Kagerou Day! 🌕 #9月23日は今泉影狼の日 (p|t) Approximately the Autumn Equinox, around which a notable full moon called the Harvest Moon occurs - fitting for a werewolf

The Autumn Equinox is the Aki Sisters' Day! #秋分の日は秋姉妹の日 (p|t) #秋静葉 (p|t) #秋穣子 (p|t) The Aki sisters are associated with autumn, as their surname Aki literally means autumn

Upcoming: 9/23: Kagerou Day 9/30: Kurumi Day, Kourindou Anniversary 10/1: Yuugi Day 10/3: Doremy Day 10/4: Teruyo Day, Tenshi Day, Toyohime Day 10/5: Tenko Day

Surprise! Tsukumogami Sisters Day is also Kogasa Day! #9月19日は小傘の日 (p|t) This is tsukumogami sisters day, and Kogasa is a sort of tsukumogami

9/19 is Tsukumogami Sisters Day! #9月19日は九十九姉妹の日 (p|t) Per the linked Pixiv Dictionary post, 付喪神→つくも→九十九→919→9月19日

Upcoming: 9/19: Tsukumo Day, Kogasa Day 9/21: Aki Equinox 9/23: Kagerou Day 9/30: Kurumi Day, Kourindou Anniversary

9/13 is Nine-Tailed Day! #9月13日は藍しゃまの日 (p|t) #9月13日は九尾の日 (p|t) #東方藍染日和 (p|t) The number 13 resembles the letter B, which is a homonym for 尾 (tail), making this 9尾 or "9 Tails." Ran is a nine-tailed kitsune

9/10 is Kumoi Ichirin Day! #9月10日は雲居一輪の日 (p|t) Goroawase: 9(ku(moi)) 1(ichi)0(rin)

9/9 is Cirno Day! #9月9日はチルノの日 (p|t) #チルノの日 (p|t) You already know why

9/8 is Kaguya Day! #9月8日は輝夜の日 (p|t) Goroawase: 9(Gu)8(ya)

Upcoming: 9/8: Kaguya Day 9/9: Cirno Day 9/10: Ichirin Day 9/13: Nine-Tailed Day 9/19: Tsukumo Day, Kogasa Day 9/21: Aki Equinox

9/6 is Eiki Day! #9月6日は四季映姫の日 (p|t) Goroawase: 9(Ku)6(ro)=Kuro (black), tying into Eiki's black-and-white judgements

9/6 is Saki Day! #9月6日は驪駒早鬼の日 (p|t) Goroawase: 9(Ku)6(ro)=Kuro (black), i.e. Kurokoma, Prince Shōtoku's Black Pegasus

08/37 is AyaSana Day! #9月6日はあやさなの日 (p|t) Goroawase: 0(A?)8(ya) 3(Sa)7(na)

Kero! Kero! 9/6 is Suwako Day! #9月6日は諏訪子の日 (p|t) Goroawase: 9(Ke)6(ro)=kero (frog onomatopoeia)

Upcoming: 9/6: Suwako Day, AyaSana Day, Saki Day, Eiki Day 9/8: Kaguya Day 9/9: Cirno Day 9/10: Ichirin Day 9/13: Nine-Tailed Day

8/28 is MayuKeiki Day! #8月28日はまゆけーきの日 (p|t) Goroawase: 8(Ha)2(ni)8(wa)/8(Ha)2(ni)8(ya)