THE MONTH OF RAJAB
Rajab is the seventh month in the Islamic lunar calendar. This month is regarded as one of the sacred months (Al-Ashhur-al-hurum), (Surah Taubah, Verse : 36).
The others are Dhul Qa’dah, Dhul Hijjah, and Al Muharram. In these months many activities which were permissible in the days of the Holy Prophet Sallalahu Alayhi Wassalam would become prohibited.
Rajab is also a preliminary part to the month of Ramadhan, since Ramadhan follows it after the intervening month of Sha’ban, with the sighting of the crescent of Rajab, Rasullulah Sallalahu Alayhi Wassallam would anticipate and begin preparations for the month of Ramadhan, i.e two months in advance.
Sayyiduna Anas Ibn Malek Radiyallahu Anhu Reports that whenever the month of Rajab would arrive,
Rasullulah Sallalahu Allayhi Wassallam would make the following Supplication ,
اَللّهُمَّ بَارِكْ لَنَا فِيْ رَجَبَ وَشَعْبَانَ وَبَلِّغْنَا رَمَضَانَ
Allahumma barik lana fi Rajab wa Sha’baan wa ballighna Ramadhan
‘‘O Allah ! Grant us Barakah (Blessing) during (the months of) Rajab and Sha’baan and allow us to reach Ramadhan.’’
 Shu’abul Imaan #3534, Ibnu Sunni #662,
Mukhtassar Zawaid Bazzar #662, Al Azkhaar #549