| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 431 | 23-Sep-1039 | Sunday | 29 days. |
| Safar 431 | 22-Oct-1039 | Monday | 30 days. |
| Rabi al-awwal 431 | 21-Nov-1039 | Wednesday | 29 days. |
| Rabi al-thani 431 | 20-Dec-1039 | Thursday | 29 days. |
| Jumada al-awwal 431 | 18-Jan-1040 | Friday | 30 days. |
| Jumada al-thani 431 | 17-Feb-1040 | Sunday | 29 days. |
| Rajab 431 | 17-Mar-1040 | Monday | 30 days. |
| Shaban 431 | 16-Apr-1040 | Wednesday | 29 days. |
| Ramadan 431 | 15-May-1040 | Thursday | 30 days. |
| Shawwal 431 | 14-Jun-1040 | Saturday | 30 days. |
| Dhu al-Qidah 431 | 14-Jul-1040 | Monday | 30 days. |
| Dhu al-Hijjah 431 | 13-Aug-1040 | Wednesday | 29 days. |