Safar (Safar) — the second month of the Muslim calendar, the next the month of Muharram. It is believed that the name of the month of Safar is associated with the color yellow because it was given the name of the month during the fall season when it's time to sway in the nature of yellow leaves.
Some sources say that the month of Safar was named so because of for desertion (isfaar) Mecca. In other words, Mecca became absolutely deserted when people did move in this month.
Muslim calendar, which is based on the lunar cycle, was first introduced in 638, a close associate of and the second caliph Umar ibn al-Khattab (Umar ibn Al-KHaTTab , 592-644). He made an attempt to rationalize the various, sometimes conflicting, system of calculating time, applied in his day.
Umar repeatedly konsultitrovalsya with his advisers about the start date of the new Muslim chronology.