Festivals have long mixed celebration with a bit of risk, using calendars to...

https://fun-wiki.win/index.php/Is_Festival_Gambling_More_About_Community_Than_Money%3F

Festivals have long mixed celebration with a bit of risk, using calendars to mark when gambling should stop. Take Saturnalia, where games ended as the holiday closed, or Diwali’s teen patti, played only during the festival