Rajab is the seventh month in the Islamic lunar calendar. This month was regarded as one of the sacred months (Al-Ashhur-al-hurum) in which battles were prohibited in the days of the Holy Prophet sallalahu alayhi wassalam .
Rajab is also a prelude to the month of Ramadan, because Ramadan follows it after the intervening month of Sha’ban. Therefore, when the Holy Prophet sighted the moon of Rajab, he used to pray to Allah in the following words:
اللهم بارك لنا في رجب و شعبان و بلغنا رمضان
“O Allah, make the months of Rajab and Sha’ban blessed for us, and let us reach the month of Ramadan (i.e. prolong our life up to Ramadan, so that we may benefit from its merits and blessings).”