| Western Month | Converts To Hijri Month |
|---|
| Jan 639 | Dhu al-Hijjah, 17 |
| Feb 639 | Muharram, 18 |
| Mar 639 | Safar, 18 |
| Apr 639 | Rabi al-awwal, 18 |
| May 639 | Rabi al-thani, 18 |
| Jun 639 | Jumada al-awwal, 18 |
| Jul 639 | Jumada al-thani, 18 |
| Aug 639 | Rajab, 18 |
| Sep 639 | Shaban, 18 |
| Oct 639 | Ramadan, 18 |
| Nov 639 | Shawwal, 18 |
| Dec 639 | Dhu al-Qidah, 18 |