The best time to call London from Kolkata is 1.5 PM–5 PM your time (Kolkata). London, UK is 4 hours behind Kolkata, India. You have 3.5 hours of business hours overlap for scheduling calls.
Call between 1.5 PM–5 PM Kolkata time. This is 9 AM–0.5 PM in London.
Kolkata and London share 3.5 hours of overlapping business hours (9 AM – 5 PM local time).
The best time to call London from Kolkata is 1.5 PM–5 PM Kolkata time. This gives you 3.5 hours of business hours overlap.
London is 4 hours behind Kolkata.
Avoid calling before 11.5 AM your time (they haven't started their day).
Yes, Kolkata and London have approximately 3.5 hours of overlapping business hours per day.
You have 3.5 hours of overlap. Call during 1.5 PM–5 PM your time for the best results.
Both in business hours Both awake One outside comfort zone Sleeping hours
Kolkata: 1.5 PM–5 PM GMT+5:30
London: 9 AM–0.5 PM GMT+1
| Kolkata (GMT+5:30) | London (GMT+1) | Status |
|---|---|---|
| 7 AM | 3 AM | 🔴 They're sleeping |
| 8 AM | 4 AM | 🔴 They're sleeping |
| 9 AM | 5 AM | 🔴 They're sleeping |
| 10 AM | 6 AM | 🔴 They're sleeping |
| 11 AM | 7 AM | 🟡 They're awake |
| 12 PM | 8 AM | 🟡 They're awake |
| 1 PM | 9 AM | ✅ Both in office |
| 2 PM | 10 AM | ✅ Both in office |
| 3 PM | 11 AM | ✅ Both in office |
| 4 PM | 12 PM | ✅ Both in office |
| 5 PM | 1 PM | 🟡 They're awake |
| 6 PM | 2 PM | 🟡 They're awake |
| 7 PM | 3 PM | 🟡 They're awake |
| 8 PM | 4 PM | 🟡 They're awake |
| 9 PM | 5 PM | 🟡 They're awake |