| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 20 | 20-Dec-0640 | Wednesday | 30 days. |
| Safar 20 | 19-Jan-0641 | Friday | 29 days. |
| Rabi al-awwal 20 | 17-Feb-0641 | Saturday | 30 days. |
| Rabi al-thani 20 | 19-Mar-0641 | Monday | 30 days. |
| Jumada al-awwal 20 | 18-Apr-0641 | Wednesday | 29 days. |
| Jumada al-thani 20 | 17-May-0641 | Thursday | 30 days. |
| Rajab 20 | 16-Jun-0641 | Saturday | 29 days. |
| Shaban 20 | 15-Jul-0641 | Sunday | 30 days. |
| Ramadan 20 | 14-Aug-0641 | Tuesday | 29 days. |
| Shawwal 20 | 12-Sep-0641 | Wednesday | 30 days. |
| Dhu al-Qidah 20 | 12-Oct-0641 | Friday | 29 days. |
| Dhu al-Hijjah 20 | 10-Nov-0641 | Saturday | 30 days. |