Festivals like Saturnalia, Diwali, and Lunar New Year have long included...

https://blogfreely.net/teresa-long85/why-was-gambling-allowed-during-saturnalia-but-banned-the-rest-of-the-year

Festivals like Saturnalia, Diwali, and Lunar New Year have long included gambling as part of the celebration, but with clear end dates set by calendars to keep things fun and contained