Muharram 1640 — Hijri to Gregorian
| Hijri Day | Hijri Month & Year | Western Date | Day of Week |
|---|---|---|---|
| 1 | Muharram, 1640 | 27-September-2212 | Sunday |
| 2 | Muharram, 1640 | 28-September-2212 | Monday |
| 3 | Muharram, 1640 | 29-September-2212 | Tuesday |
| 4 | Muharram, 1640 | 30-September-2212 | Wednesday |
| 5 | Muharram, 1640 | 1-October-2212 | Thursday |
| 6 | Muharram, 1640 | 2-October-2212 | Friday |
| 7 | Muharram, 1640 | 3-October-2212 | Saturday |
| 8 | Muharram, 1640 | 4-October-2212 | Sunday |
| 9 | Muharram, 1640 | 5-October-2212 | Monday |
| 10 | Muharram, 1640 | 6-October-2212 | Tuesday |
| 11 | Muharram, 1640 | 7-October-2212 | Wednesday |
| 12 | Muharram, 1640 | 8-October-2212 | Thursday |
| 13 | Muharram, 1640 | 9-October-2212 | Friday |
| 14 | Muharram, 1640 | 10-October-2212 | Saturday |
| 15 | Muharram, 1640 | 11-October-2212 | Sunday |
| 16 | Muharram, 1640 | 12-October-2212 | Monday |
| 17 | Muharram, 1640 | 13-October-2212 | Tuesday |
| 18 | Muharram, 1640 | 14-October-2212 | Wednesday |
| 19 | Muharram, 1640 | 15-October-2212 | Thursday |
| 20 | Muharram, 1640 | 16-October-2212 | Friday |
| 21 | Muharram, 1640 | 17-October-2212 | Saturday |
| 22 | Muharram, 1640 | 18-October-2212 | Sunday |
| 23 | Muharram, 1640 | 19-October-2212 | Monday |
| 24 | Muharram, 1640 | 20-October-2212 | Tuesday |
| 25 | Muharram, 1640 | 21-October-2212 | Wednesday |
| 26 | Muharram, 1640 | 22-October-2212 | Thursday |
| 27 | Muharram, 1640 | 23-October-2212 | Friday |
| 28 | Muharram, 1640 | 24-October-2212 | Saturday |
| 29 | Muharram, 1640 | 25-October-2212 | Sunday |
| 30 | Muharram, 1640 | 26-October-2212 | Monday |
Baseline: Tabular (Kuwaiti) Hijri. Local moon-sighting may vary ±1 day.