Islamic Hijri Calendar For May - 866 Hijri
| Western Date | Day of Week | Hijri Date |
| 1-May-866 | Wednesday | 12-Rabi Al-Thani-252 |
| 2-May-866 | Thursday | 13-Rabi Al-Thani-252 |
| 3-May-866 | Friday | 14-Rabi Al-Thani-252 |
| 4-May-866 | Saturday | 15-Rabi Al-Thani-252 |
| 5-May-866 | Sunday | 16-Rabi Al-Thani-252 |
| 6-May-866 | Monday | 17-Rabi Al-Thani-252 |
| 7-May-866 | Tuesday | 18-Rabi Al-Thani-252 |
| 8-May-866 | Wednesday | 19-Rabi Al-Thani-252 |
| 9-May-866 | Thursday | 20-Rabi Al-Thani-252 |
| 10-May-866 | Friday | 21-Rabi Al-Thani-252 |
| 11-May-866 | Saturday | 22-Rabi Al-Thani-252 |
| 12-May-866 | Sunday | 23-Rabi Al-Thani-252 |
| 13-May-866 | Monday | 24-Rabi Al-Thani-252 |
| 14-May-866 | Tuesday | 25-Rabi Al-Thani-252 |
| 15-May-866 | Wednesday | 26-Rabi Al-Thani-252 |
| 16-May-866 | Thursday | 27-Rabi Al-Thani-252 |
| 17-May-866 | Friday | 28-Rabi Al-Thani-252 |
| 18-May-866 | Saturday | 29-Rabi Al-Thani-252 |
| 19-May-866 | Sunday | 30-Rabi Al-Thani-252 |
| 20-May-866 | Monday | 1-Jumada Al-Awwal-252 |
| 21-May-866 | Tuesday | 2-Jumada Al-Awwal-252 |
| 22-May-866 | Wednesday | 3-Jumada Al-Awwal-252 |
| 23-May-866 | Thursday | 4-Jumada Al-Awwal-252 |
| 24-May-866 | Friday | 5-Jumada Al-Awwal-252 |
| 25-May-866 | Saturday | 6-Jumada Al-Awwal-252 |
| 26-May-866 | Sunday | 7-Jumada Al-Awwal-252 |
| 27-May-866 | Monday | 8-Jumada Al-Awwal-252 |
| 28-May-866 | Tuesday | 9-Jumada Al-Awwal-252 |
| 29-May-866 | Wednesday | 10-Jumada Al-Awwal-252 |
| 30-May-866 | Thursday | 11-Jumada Al-Awwal-252 |
| 31-May-866 | Friday | 12-Jumada Al-Awwal-252 |
🌴