| Hijri Month | Starts On | Day of Week | Days in Month |
|---|---|---|---|
| Muharram 40 | 17-May-0660 | Sunday | 29 days. |
| Safar 40 | 15-Jun-0660 | Monday | 30 days. |
| Rabi al-awwal 40 | 15-Jul-0660 | Wednesday | 29 days. |
| Rabi al-thani 40 | 13-Aug-0660 | Thursday | 30 days. |
| Jumada al-awwal 40 | 12-Sep-0660 | Saturday | 30 days. |
| Jumada al-thani 40 | 12-Oct-0660 | Monday | 29 days. |
| Rajab 40 | 10-Nov-0660 | Tuesday | 30 days. |
| Shaban 40 | 10-Dec-0660 | Thursday | 29 days. |
| Ramadan 40 | 8-Jan-0661 | Friday | 30 days. |
| Shawwal 40 | 7-Feb-0661 | Sunday | 29 days. |
| Dhu al-Qidah 40 | 8-Mar-0661 | Monday | 29 days. |
| Dhu al-Hijjah 40 | 6-Apr-0661 | Tuesday | 30 days. |