The Islamic calendar, however, is based on a different set of conventions.

This is adapted from the use of months in the Islamic calendar.

It was composed between 1436 and 1437 (840 in the Islamic calendar).

A day in the Islamic calendar is defined as beginning at sunset.

This is a very sacred month in the Islamic calendar, marking the end of the year.

Then he added his birth-date according to the Islamic calendar: 1387.

That was the period according to the Islamic calendar.

He was born in 1303 of the Islamic calendar.

The dates for these holidays vary according to the Islamic calendar.

Muslim holidays are followed based on the Islamic lunar calendar.