A Number Pun based on a particular date.
November is notorious for having a lot of these because "11" resembles イイ (good/great). For example, November 29th is "Good Meat Day" (ii niku no hi) because two (ni) and nine (ku) sounds like meat (niku).
See also
- Angel Day (Oct. 4)
- Bunny Day (Aug. 2 or 21)
- Cat Day (Feb. 22)
- Flower Day (Aug. 7)
- Fundoshi Day (Feb. 14)
- Gardevoir Day (Mar. 7)
- Good Armpit Day (Nov. 9)
- Good Ass Day (Nov. 4)
- Good Breasts Day (Nov. 8)
- Good Brothers Day (Nov. 23)
- Good Hips Day (Nov. 12)
- Good Meat Day (Nov. 29)
- Good Oshi Day (Nov. 4)
- Good Thighs Day (Nov. 21)
- Good Twins Day (Nov. 25)
- Honey Day (Aug. 3)
- Ii Fuufu No Hi (Nov. 22)
- Junko Day (Jun. 5)
- Koishi Day (May 14)
- Maid Day (May 10)
- Mario Day (Mar. 10)
- Masturbation Day (Jul. 21)
- Meat Day (Feb. 9, or 29 of any month)
- Miko Day (Mar. 5)
- Miku Day (Mar. 9)
- Nice Knee Socks Day (Feb 8th or Nov 28th)
- Nico Day (Feb. 5)
- Nitori Day (Feb. 10)
- Breasts Day (Aug. 1)
- Panties Day (Aug. 2)
- Pineapple Day (Aug. 7)
- Rabbit Day (Mar. 3)
- Rubber Day (May 6)
- Sagume Day (Mar. 9)
- Satori Day (Mar. 10)
- Sekibanki Day (Jun. 6)
- Shujuu No Hi (Apr. 10)
- Stomach Day (Nov. 7)
- Strawberry Panties Day (Aug. 2, 2015)
- Succubus Day (Mar. 9)
- Wriggle Day (Jun. 4)
- Youmu Day (Apr. 6)