Festivals have long been a time for games of chance, from Saturnalia’s dice...

https://emilysexpertchat.yousher.com/why-do-calendars-keep-certain-days-open-for-risk-taking

Festivals have long been a time for games of chance, from Saturnalia’s dice rolls to Diwali’s teen patti cards and Lunar New Year mahjong. These traditions often used calendars to mark a clear end to gambling, helping keep play fun and within limits