Rabi Al-Awwal 640 — Hijri to Gregorian
| Hijri Day | Hijri Month & Year | Western Date | Day of Week |
|---|---|---|---|
| 1 | Rabi Al-Awwal, 640 | 4-September-1242 | Thursday |
| 2 | Rabi Al-Awwal, 640 | 5-September-1242 | Friday |
| 3 | Rabi Al-Awwal, 640 | 6-September-1242 | Saturday |
| 4 | Rabi Al-Awwal, 640 | 7-September-1242 | Sunday |
| 5 | Rabi Al-Awwal, 640 | 8-September-1242 | Monday |
| 6 | Rabi Al-Awwal, 640 | 9-September-1242 | Tuesday |
| 7 | Rabi Al-Awwal, 640 | 10-September-1242 | Wednesday |
| 8 | Rabi Al-Awwal, 640 | 11-September-1242 | Thursday |
| 9 | Rabi Al-Awwal, 640 | 12-September-1242 | Friday |
| 10 | Rabi Al-Awwal, 640 | 13-September-1242 | Saturday |
| 11 | Rabi Al-Awwal, 640 | 14-September-1242 | Sunday |
| 12 | Rabi Al-Awwal, 640 | 15-September-1242 | Monday |
| 13 | Rabi Al-Awwal, 640 | 16-September-1242 | Tuesday |
| 14 | Rabi Al-Awwal, 640 | 17-September-1242 | Wednesday |
| 15 | Rabi Al-Awwal, 640 | 18-September-1242 | Thursday |
| 16 | Rabi Al-Awwal, 640 | 19-September-1242 | Friday |
| 17 | Rabi Al-Awwal, 640 | 20-September-1242 | Saturday |
| 18 | Rabi Al-Awwal, 640 | 21-September-1242 | Sunday |
| 19 | Rabi Al-Awwal, 640 | 22-September-1242 | Monday |
| 20 | Rabi Al-Awwal, 640 | 23-September-1242 | Tuesday |
| 21 | Rabi Al-Awwal, 640 | 24-September-1242 | Wednesday |
| 22 | Rabi Al-Awwal, 640 | 25-September-1242 | Thursday |
| 23 | Rabi Al-Awwal, 640 | 26-September-1242 | Friday |
| 24 | Rabi Al-Awwal, 640 | 27-September-1242 | Saturday |
| 25 | Rabi Al-Awwal, 640 | 28-September-1242 | Sunday |
| 26 | Rabi Al-Awwal, 640 | 29-September-1242 | Monday |
| 27 | Rabi Al-Awwal, 640 | 30-September-1242 | Tuesday |
| 28 | Rabi Al-Awwal, 640 | 1-October-1242 | Wednesday |
| 29 | Rabi Al-Awwal, 640 | 2-October-1242 | Thursday |
| 30 | Rabi Al-Awwal, 640 | 3-October-1242 | Friday |
Baseline: Tabular (Kuwaiti) Hijri. Local moon-sighting may vary ±1 day.