| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 639 | 12-July-1241 | Friday | 29 days. |
| Safar 639 | 10-August-1241 | Saturday | 30 days. |
| Rabi Al-Awwal 639 | 9-September-1241 | Monday | 29 days. |
| Rabi Al-Thani 639 | 8-October-1241 | Tuesday | 30 days. |
| Jumada Al-Awwal 639 | 7-November-1241 | Thursday | 29 days. |
| Jumada Al-Thani 639 | 6-December-1241 | Friday | 30 days. |
| Rajab 639 | 5-January-1242 | Sunday | 29 days. |
| Shaban 639 | 3-February-1242 | Monday | 30 days. |
| Ramadan 639 | 5-March-1242 | Wednesday | 30 days. |
| Shawwal 639 | 4-April-1242 | Friday | 29 days. |
| Dhu Al-Qidah 639 | 3-May-1242 | Saturday | 30 days. |
| Dhu Al-Hijjah 639 | 2-June-1242 | Monday | 29 days. |