September 3 is Reverse Zangoose Day (裏39の日, Ura (Reverse) 3/9 Day in Japanese), created in response to Zangoose Day's discouragement of porn of the Pokemon Zangoose. The date is a reversal of 3/9, the day Zangoose Day falls on. Unlike with the original day, porn is part and parcel of the intent of the day. The first Reverse Zangoose Day was celebrated in 2010, the year of the second Zangoose Day.

As with the regular Zangoose Day, Reverse Zangoose Day was established by yamik64. Images celebrating Reverse Zangoose Day on Pixiv can be found under the tag #ura3/9day93 .

^{*In the form of Japanese wordplay called goroawase, the number 39 can possibly be read as "zan-gu" (ザング).}

See also

• September (month)
• Zangoose
• Zangoose Day