Convert India Time to Réunion Time
IST · UTC+5:30 → RET · UTC+4
IST is 1 hour 30 minutes ahead of RET
Mumbai · IST
Tuesday, 8 September 2026
Saint-Denis · UTC+4
Tuesday, 8 September 2026
When are both sides at work?Each column is one hour of the day in the first city; the second row shows the same moment in the other city. Gold means office hours (09:00–18:00), dusk means awake but off work, night means asleep (23:00–07:00). Columns where both rows are gold are good meeting times.
Shared working hours: 10:30–18:00 in Mumbai is 09:00–16:30 in Saint-Denis.
Working (09–18) Awake, off the clock Asleep (23–07)
Pick a time and share it
12:36 Tue 8 Sep Mumbai = 11:06 Tue 8 Sep Saint-Denis
Hour-by-hour conversion
| Mumbai (IST)Every hour of today in the first city, with the matching time in the second. “Next day” means the calendar date is already tomorrow there. The highlighted row is right now. | Saint-Denis (RET) | |
|---|---|---|
| 00:00 | 22:30prev. day | |
| 01:00 | 23:30prev. day | |
| 02:00 | 00:30 | |
| 03:00 | 01:30 | |
| 04:00 | 02:30 | |
| 05:00 | 03:30 | |
| 06:00 | 04:30 | |
| 07:00 | 05:30 | |
| 08:00 | 06:30 | |
| 09:00 | 07:30 | |
| 10:00 | 08:30 | |
| 11:00 | 09:30 | Both at work |
| 12:00 | 10:30 | Now |
| 13:00 | 11:30 | Both at work |
| 14:00 | 12:30 | Both at work |
| 15:00 | 13:30 | Both at work |
| 16:00 | 14:30 | Both at work |
| 17:00 | 15:30 | Both at work |
| 18:00 | 16:30 | |
| 19:00 | 17:30 | |
| 20:00 | 18:30 | |
| 21:00 | 19:30 | |
| 22:00 | 20:30 | |
| 23:00 | 21:30 |
About this conversion
IST here means India Time, represented by Mumbai (Asia/Kolkata), currently UTC+5:30. RET means Réunion Time, represented by Saint-Denis (Indian/Reunion), currently UTC+4.
IST is used by 3 zones, including India. If you meant a different one, see every meaning of IST.
Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in Mumbai; day boundaries are marked where the date differs.
Quick answers
- 09:00 IST is 07:30 RET
- 12:00 IST is 10:30 RET
- 15:00 IST is 13:30 RET
- 18:00 IST is 16:30 RET
Related conversions
- India Time to Sakhalin TimeIST → SAKT
- India Time to South Africa TimeIST → SAST
- India Time to Tajikistan TimeIST → TJT
- India Time to Yekaterinburg TimeIST → YEKT
- Japan Time to Réunion TimeJST → RET
- Kosrae Time to Réunion TimeKOST → RET
- Moscow Time to Réunion TimeMSK → RET
- Réunion Time to South Africa TimeRET → SAST
- Eastern Time to India TimeEST → IST
- Eastern Time to Réunion TimeEST → RET
- Time in Mumbainow, DST, offset
- Time in Saint-Denisnow, DST, offset