Das Lakshana or Paryushana is the most important annual holy event for Jains and is usually celebrated in August or September in Hindi calendar (indian calendar) Bhadrapad Month's Shukla Paksha. Jains increase their level of spiritual intensity often using fasting and prayer/meditation to help. The five main vows are emphasized during this time. There are no set rules, and followers are encouraged to practice according to their ability and desires.