| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 645 | 8-May-1247 | Wednesday | 29 days. |
| Safar 645 | 6-Jun-1247 | Thursday | 30 days. |
| Rabi al-awwal 645 | 6-Jul-1247 | Saturday | 29 days. |
| Rabi al-thani 645 | 4-Aug-1247 | Sunday | 30 days. |
| Jumada al-awwal 645 | 3-Sep-1247 | Tuesday | 29 days. |
| Jumada al-thani 645 | 2-Oct-1247 | Wednesday | 30 days. |
| Rajab 645 | 1-Nov-1247 | Friday | 30 days. |
| Shaban 645 | 1-Dec-1247 | Sunday | 29 days. |
| Ramadan 645 | 30-Dec-1247 | Monday | 30 days. |
| Shawwal 645 | 29-Jan-1248 | Wednesday | 30 days. |
| Dhu al-Qidah 645 | 28-Feb-1248 | Friday | 29 days. |
| Dhu al-Hijjah 645 | 28-Mar-1248 | Saturday | 30 days. |