Best Meeting Time: IST & GMT
Working hours overlap & scheduling guide — GMT is 5h 30m behind IST
3h
Overlap
5.5h
Difference
Limited
Scheduling
IST
GMT+5:30
UTC+5:30
GMT
GMT
UTC+0
3 overlapping business hours
Best window: 3 PM – 5 PM IST time
Both in office
One in office
Neither in office
IST
Office
Office
GMT
12 AM
6.5 PM
1 AM
7.5 PM
2 AM
8.5 PM
3 AM
9.5 PM
4 AM
10.5 PM
5 AM
11.5 PM
6 AM
0.5 AM
7 AM
1.5 AM
8 AM
2.5 AM
9 AM
3.5 AM
10 AM
4.5 AM
11 AM
5.5 AM
12 PM
6.5 AM
1 PM
7.5 AM
2 PM
8.5 AM
3 PM
Best
9.5 AM
4 PM
Best
10.5 AM
5 PM
Best
11.5 AM
6 PM
0.5 PM
7 PM
1.5 PM
8 PM
2.5 PM
9 PM
3.5 PM
10 PM
4.5 PM
11 PM
5.5 PM
Complete 24-Hour Conversion — IST to GMT
IST
→
GMT
Scheduling Tips for IST & GMT
- Best window: 3 PM – 5 PM IST / 9.5 AM – 11.5 AM GMT
- Send calendar invites with both time zones listed to avoid confusion.
- DST changes can shift the overlap by ±1 hour — always double-check.