“Verily, the number of months with Allaah is twelve months (in a year),

The month of Rajab is one of the sacred months of which Allaah says
(interpretation of the meaning):
"Verily, the number of months with Allaah is twelve months (in a
year), so was it ordained by Allaah on the Day when He created the
heavens and the earth; of them four are Sacred (i.e. the 1st, the 7th,
the 11th and the 12th months of the Islamic calendar). That is the
right religion, so wrong not yourselves therein"
[al-Tawbah 9:36]

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