The Four Months of Hajj (Zul-Hijjah, Muharram, Safar, & Rabi I)
[2:197] Hajj shall be observed in the specified months.* Whoever sets out to observe Hajj shall refrain from sexual intercourse, misconduct, and arguments throughout Hajj. Whatever good you do, GOD is fully aware thereof. As you prepare your provisions for the journey, the best provision is righteousness. You shall observe Me, O you who possess intelligence.
*2:197 Hajj can be observed any time during the Sacred Months: Zul-Hijjah, Muharram, Safar, and Rabi I. Local governments restrict Hajj to a few days for their own convenience. See 9:37
Altering the Sacred Months*
[9:37] Altering the Sacred Months is a sign of excessive disbelief; it augments the straying of those who have disbelieved. They alternate the Sacred Months and the regular months, while preserving the number of months consecrated by GOD. They thus violate what GOD has consecrated. Their evil works are adorned in their eyes. GOD does not guide the disbelieving people.
*9:37 The Sacred Months according to the corrupted Muslim World are Rajab, Zul-Qe`dah, Zul-Hijjah, and Muharram (7th, 11th, 12th and 1st months of the Islamic Calendar). A careful study of the Quran, however, reveals that they should be Zul-Hijjah, Muharram, Safar, and Rabi I (12th, 1st, 2nd, and 3rd months). See Appendix 15
According to 9:2 and 9:5 the four sacred months are consecutive months.
[9:2] Therefore, roam the earth freely for four months, and know that you cannot escape from GOD, and that GOD humiliates the disbelievers.
[9:5] Once the Sacred Months are past,…
Additionally, Rabi I (Rabi Aval) is the third month of the Islamic calendar, but the word Rabi means spring, but in classical Arabic it means fourth or one fourth. Why would the third month of the Islamic calendar be called the fourth? Because it is the fourth sacred month.