Festivals have long included gambling traditions, like Saturnalia’s lively bets...

https://www.last-bookmarks.win/festivals-have-long-been-a-time-to-take-chances-through-gambling-but-calendars

Festivals have long included gambling traditions, like Saturnalia’s lively bets or Diwali’s teen patti games. These celebrations often used calendars to set clear end dates for play, helping keep risks in check