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