The first day of Muharram is the beginning of the hegira year. To find out what day it is (it was, it will be), the concerned year is multiplied by five. The number obtained is divided by eight. The remainder shows the number of days from Thursday. For example, the first of Muharram, 1357: Five times 1357 is 6785. When this is divided by eight the remainder is one. The first day of Muharram is Thursday.
