| supports all known variants of the tabular Islamic calendar• For Shia, the martyrdom of , the grandson of Muhammad, and his followers | |
|---|---|
| Generally 6th Day of Every Month is celebrated and observed as Chatthi• 3 Sha'ban Birthday of Husayn ibn Ali | with date converter valid from 1937 to 2077• 27 Rajab for majority of Muslims• based on the tabular Islamic calendar• 21 Ramadan Ali ibn Abi Talib's martyrdom |