Islamic Hijri Calendar For December - 1640 Hijri
| Western Date | Day of Week | Hijri Date |
| 1-December-1640 | Saturday | 17-Shaban-1050 |
| 2-December-1640 | Sunday | 18-Shaban-1050 |
| 3-December-1640 | Monday | 19-Shaban-1050 |
| 4-December-1640 | Tuesday | 20-Shaban-1050 |
| 5-December-1640 | Wednesday | 21-Shaban-1050 |
| 6-December-1640 | Thursday | 22-Shaban-1050 |
| 7-December-1640 | Friday | 23-Shaban-1050 |
| 8-December-1640 | Saturday | 24-Shaban-1050 |
| 9-December-1640 | Sunday | 25-Shaban-1050 |
| 10-December-1640 | Monday | 26-Shaban-1050 |
| 11-December-1640 | Tuesday | 27-Shaban-1050 |
| 12-December-1640 | Wednesday | 28-Shaban-1050 |
| 13-December-1640 | Thursday | 29-Shaban-1050 |
| 14-December-1640 | Friday | 1-Ramadan-1050 |
| 15-December-1640 | Saturday | 2-Ramadan-1050 |
| 16-December-1640 | Sunday | 3-Ramadan-1050 |
| 17-December-1640 | Monday | 4-Ramadan-1050 |
| 18-December-1640 | Tuesday | 5-Ramadan-1050 |
| 19-December-1640 | Wednesday | 6-Ramadan-1050 |
| 20-December-1640 | Thursday | 7-Ramadan-1050 |
| 21-December-1640 | Friday | 8-Ramadan-1050 |
| 22-December-1640 | Saturday | 9-Ramadan-1050 |
| 23-December-1640 | Sunday | 10-Ramadan-1050 |
| 24-December-1640 | Monday | 11-Ramadan-1050 |
| 25-December-1640 | Tuesday | 12-Ramadan-1050 |
| 26-December-1640 | Wednesday | 13-Ramadan-1050 |
| 27-December-1640 | Thursday | 14-Ramadan-1050 |
| 28-December-1640 | Friday | 15-Ramadan-1050 |
| 29-December-1640 | Saturday | 16-Ramadan-1050 |
| 30-December-1640 | Sunday | 17-Ramadan-1050 |
| 31-December-1640 | Monday | 18-Ramadan-1050 |
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