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