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