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)
• Fundoshi Day (Feb. 14)
• Gardevoir Day (Mar. 7)
• Good Ass Day (Nov. 4)
• Good Breasts Day (Nov. 8)
• Good Brothers Day (Nov. 23)
• Good Kneehighs Day (Nov. 28)
• Good Meat Day (Nov. 29)
• 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)

This tag implicates number_pun (learn more).

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