| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 20 | 20-December-640 | Wednesday | 30 days. |
| Safar 20 | 19-January-641 | Friday | 29 days. |
| Rabi Al-Awwal 20 | 17-February-641 | Saturday | 30 days. |
| Rabi Al-Thani 20 | 19-March-641 | Monday | 30 days. |
| Jumada Al-Awwal 20 | 18-April-641 | Wednesday | 29 days. |
| Jumada Al-Thani 20 | 17-May-641 | Thursday | 30 days. |
| Rajab 20 | 16-June-641 | Saturday | 29 days. |
| Shaban 20 | 15-July-641 | Sunday | 30 days. |
| Ramadan 20 | 14-August-641 | Tuesday | 29 days. |
| Shawwal 20 | 12-September-641 | Wednesday | 30 days. |
| Dhu Al-Qidah 20 | 12-October-641 | Friday | 29 days. |
| Dhu Al-Hijjah 20 | 10-November-641 | Saturday | 30 days. |