In the Holy Quran we read:
ask thee about the new moons. Say, These are means for measuring time
for people's affairs and for the Pilgrimage" (Holy Quran, Ch. 2 V.
G = H - ( (3 * H) / 100 ) + 622
H = G + ( ( G - 622) / 32 ) - 622
Where G = Gregorian year (AD)
= Hijra year (AH)
Following are the names of the Islamic months:
1. Muharram ul Haram
11. Dhul Qadah
"The number of months with Allah has been twelve months by Allah's ordinance since the day He created the heavens and the earth. Of these four are known as sacred" (Holy Quran, ch., v 36)Muharram, Rajab, Dhul Qadah and Dhul Hijja are considered to be sacred months. Fighting during these sacred months is considered to be a sin.