January:
1/5: Yumemi Day [Her attack, Strawberry Cross. (Ichigo Kurosu)]
1/9: Iku Day [Saturday Night Fever back in 1/9/2010(?)]
1/10: Momiji Day [From catchphase, ‘Wan Wan'o (わんわんお)]
February:
2/7: Miko Day [The birthday of Prince Shotoku]
2/10: Futo Day [ふ(2,Fu) と(10,To)]
March:
3/2: Sunnymilk Day [さ(3,Sa) にー(2,ni)]
3/3: Hina Day [The Japanese Doll Festival, known as Hina-Matsuri.]
¾: Myon Day [み(3,Mi) ょん(3,Yon)]
3/7: Sanae Day [さ(3,Sa) な(7,na)]
3/10: Satori Day [さ(3,Sa) とり(10,tori)]
April:
4/6: Youmu Day [よう(4,Yo) む(6,Mu)]
4/10: Parsee Day [Jealousy (嫉妬), can be read as しっ(4,Shi) と(10,To)]
4/28: Shizuha Day [し(4,Shi), ず(2,Zu), は(8,Ha)]
4/30: Keine Day [しら(4,Shira), さ(3,Sa), わ(0,Wa)]
May:
5/1: Konparo Festival, Medicine Day [A holiday in France, involving a poison in a plant named “Lily of the Valley”]
5/14: Koishi Day [こ(5,Ko) い(1, I) し(4,Shi)]
5/15: Meiling Day
5/16: Love-Colored Day [Marisa Day. 五(5,Ko) い(1,I) ろ(6,Ro)]
June:
6/4: Wriggle Day [Insect む(6,Mu) し(4,Shi)]
6/9: Patchouli Day [From Mukyuu む(6,Mu) 九(9,Kyu)]
6/11: Umbrella Day [Normally a day to draw characters with Umbrellas, but it’s usually Kogasa]
6/24: Nue day [Kenneth Arnold UFO Incident, where the pilot claimed to have spotted UFOs.]
July:
7/4: Flandre Day [Based on 495 Years. 95 Days = 7th April, on July 4.]
7/6: Byakuren Day [Namusan な(7,Na) む(6,Mu)]
7/7: Rumia Day [Based on a Rumia-only doujin event in Japan held on every 7/7]
7/14: Yuuka Day [Japanese Weather Satellite “Himawari #1” was launched on July 14 1977]
7/16: Alice Day [Seven-Colors Puppeteer Day. なな(7,Nana) いろ(16,Iro)]
7/20: Nazrin Day [ナ(7,Na) ズー(2,Zu) リン(0,Rin)]
August:
8/3: Kanako Day [や(8,Ya) さ(3,Sa) 日(Ka)]
8/5: Eirin Day [や(8, Ya) ご(5,Go) ころ(Koro)]
8/9: Hakurei Day [は(8,Wa) く(9,Ku) れい(Rei)]
8/12: Lunasa Day [ル(6, Ru) ナ(7, Na) サ(3, Sa) -> 6/73]
September:
9/6: Suwako Day [Based on Kero く(9,Ku) ろ(6,Ro)]
9/8: Kaguya Day [ぐ(9,Gu) や(8,Ya)]
9/9: Cirno Day [Most popular day, needs no explanation.]
9/10: Ichirin Day [くもい(9, Kumoi) いち(1,Ichi) りん(0,Rin)]
9/30: Kurumi Day [く(9,Ku) るみ(3,Ru) まるい(0,Marui)]
October:
10/4: Tenshi Day [Ten(10,in English) 子(4,Shi)]
10/9: Tengu Day [Ten(10,in English) ぐ(9,gu)]
10/9: Akyu Day [あ(10 in Hexadecimal,A) きゅう(9,kyu)]
10/10: Chen Day [Ten rhymes with Chen]
10/24: Mokou Day [ふ(2, Fu) し(4,Shi)]
10/25: Tojiko Day [と(10,To) じ(2,Ji) こ(5,Ko)]
November:
11/10: Kisume Day [いい(11)い(1)ど(10), sounds like いい井戸の日 (Day of the good well)]
December:
12/9: Secret Seal Club Day [ひふう(12, Can be read as Chifu) く(9, Ku) らぶ (Rabu)]