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

https://reliabless.com/is-japans-year-end-draw-similar-to-the-spanish-christmas-lottery/

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