| supports all known variants of the tabular Islamic calendar• 27 Rajab for majority of Muslims• 3 Sha'ban Birthday of Husayn ibn Ali | 27 Rajab for majority of Muslims• For Shia, the martyrdom of , the grandson of Muhammad, and his followers |
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| with date converter valid from 1937 to 2077• 3 Sha'ban Birthday of Husayn ibn Ali | Generally 6th Day of Every Month is celebrated and observed as Chatthi• based on the tabular Islamic calendar• supports all known variants of the tabular Islamic calendar• with date converter valid from 1937 to 2077• "The calendar in use today in most of the world is the Gregorian or new-style calendar designed by a commission assembled by Pope Gregory XIII in the sixteenth century |
For Shia, the martyrdom of , the grandson of Muhammad, and his followers.
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