Islamic Hijri Calendar For 640 CE
| Western Month | Converts To Hijri Month |
|---|
| Jan 640 | Muharram, 19 |
| Feb 640 | Safar, 19 |
| Mar 640 | Rabi al-awwal, 19 |
| Apr 640 | Rabi al-thani, 19 |
| May 640 | Jumada al-awwal, 19 |
| Jun 640 | Jumada al-thani, 19 |
| Jul 640 | Rajab, 19 |
| Aug 640 | Shaban, 19 |
| Sep 640 | Ramadan, 19 |
| Oct 640 | Shawwal, 19 |
| Nov 640 | Dhu al-Qidah, 19 |
| Dec 640 | Dhu al-Hijjah, 19 |