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