Rajab (Arabic: رجب‎) is the seventh month of the Islamic calendar. The lexical definition of Rajaba is "to respect", of which Rajab is a derivative.

This month is regarded as one of the four sacred months in Islam in which battles are prohibited. The pre-Islamic Arabs also considered warfare blasphemous during the four months.

Shiite believe Rajab is the month in which ‘Alī ibn Abī Tālib, the first Imam of Shia Islam and Fourth Caliph of Sunni Islam, was born inside the Kaaba, the most sacred place of worship for Muslims.

The month is also a prelude to the month of Ramadan, which follows after the intervening month of Sha'ban. When Muhammad sighted the moon of Rajab, he used to pray to Allah in the following words:

اللّهمّ بارك لنا في رجب و شعبان وبلّغنا رمضان

Allāhumma bārik lanā fī rajaba wa shaʻbāna wa balligh-nā ramaḍāna

"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)."

Rajab is the seventh month of the Islamic calendar, Rajab may also refer to:

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Rajab (Arabic: رجب‎) is a masculine Arabic given name corresponding to the seventh month of the Islamic calendar, it is transcribed as Recep in Turkish, and Ragab from Egyptian Arabic, and Rexhep in Albanian.

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