VJ Day, September 2 College Colors Day, September 4 International Day of Charity, September 5 Cheese Pizza Day, September 5 Read a Book Day, September 6 Labor Day, September 7 Beer Lovers’ Day, September 7 Patriot’s Day, September 11 Video Games Day, September 12 Grandparents’ Day, September 13 … In addition, our research team continues to uncover the origins of existing National Days as well as discover new, exciting days for everyone to celebrate.