| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 641 | 20-Jun-1243 | Saturday | 30 days. |
| Safar 641 | 20-Jul-1243 | Monday | 30 days. |
| Rabi al-awwal 641 | 19-Aug-1243 | Wednesday | 29 days. |
| Rabi al-thani 641 | 17-Sep-1243 | Thursday | 30 days. |
| Jumada al-awwal 641 | 17-Oct-1243 | Saturday | 29 days. |
| Jumada al-thani 641 | 15-Nov-1243 | Sunday | 30 days. |
| Rajab 641 | 15-Dec-1243 | Tuesday | 29 days. |
| Shaban 641 | 13-Jan-1244 | Wednesday | 29 days. |
| Ramadan 641 | 11-Feb-1244 | Thursday | 30 days. |
| Shawwal 641 | 12-Mar-1244 | Saturday | 29 days. |
| Dhu al-Qidah 641 | 10-Apr-1244 | Sunday | 30 days. |
| Dhu al-Hijjah 641 | 10-May-1244 | Tuesday | 29 days. |