Just now, Muslims have Ramadan, Jews have Passover and Christians are very close to Easter. When this occurred to me this morning, I also wondered if these festivals apply across the board to all branches of Islam, Judaism and Christianity. There must be loads but these are the ones I can think of without research:
Islam - Sunni, Shia, Shi'ite
Judaism - Orthodox, Ultra Orthodox, Ashkenazic
Christianity - Anglican C of E, Church of Scotland, Roman Catholic, Methodist, Baptist, United Reformed, Presbyterian, Pentecostal, Coptic, Greek Orthodox.
I expect there's many branches of the three I'm unaware of. What have I missed? Thankyou.