| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 431 | 23-September-1039 | Sunday | 29 days. |
| Safar 431 | 22-October-1039 | Monday | 30 days. |
| Rabi Al-Awwal 431 | 21-November-1039 | Wednesday | 29 days. |
| Rabi Al-Thani 431 | 20-December-1039 | Thursday | 29 days. |
| Jumada Al-Awwal 431 | 18-January-1040 | Friday | 30 days. |
| Jumada Al-Thani 431 | 17-February-1040 | Sunday | 29 days. |
| Rajab 431 | 17-March-1040 | Monday | 30 days. |
| Shaban 431 | 16-April-1040 | Wednesday | 29 days. |
| Ramadan 431 | 15-May-1040 | Thursday | 30 days. |
| Shawwal 431 | 14-June-1040 | Saturday | 30 days. |
| Dhu Al-Qidah 431 | 14-July-1040 | Monday | 30 days. |
| Dhu Al-Hijjah 431 | 13-August-1040 | Wednesday | 29 days. |