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

https://danteuoqx487.theburnward.com/why-do-people-bet-on-the-grand-national-even-if-they-never-bet-otherwise

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