The Bema Festival

The Bema Festival (observed annually) is by far the holiest of all festivals among Manichaeans. Besides the Bema Festival, however, various observances (holy days) are not universal. In Christian or Judeo-Christian lands some Manichaeans might celebrate Christmas, Epiphany, Easter or Jewish holy days along with those of their own (Bema, various days of the Manichaean saints, etc).

With that being said, the Bema Festival is universal.