The best time to call Kolkata from London is 9 AM–0.5 PM your time (London). Kolkata, India is 4 hours ahead of London, UK. You have 3.5 hours of business hours overlap for scheduling calls.
Call between 9 AM–0.5 PM London time. This is 1.5 PM–5 PM in Kolkata.
London and Kolkata share 3.5 hours of overlapping business hours (9 AM – 5 PM local time).
The best time to call Kolkata from London is 9 AM–0.5 PM London time. This gives you 3.5 hours of business hours overlap.
Kolkata is 4 hours ahead of London.
Avoid calling after 5.5 PM your time (it's late night there).
Yes, London and Kolkata have approximately 3.5 hours of overlapping business hours per day.
You have 3.5 hours of overlap. Call during 9 AM–0.5 PM your time for the best results.
Both in business hours Both awake One outside comfort zone Sleeping hours
London: 9 AM–0.5 PM GMT+1
Kolkata: 1.5 PM–5 PM GMT+5:30
| London (GMT+1) | Kolkata (GMT+5:30) | Status |
|---|---|---|
| 7 AM | 11 AM | 🟡 They're awake |
| 8 AM | 12 PM | 🟡 They're awake |
| 9 AM | 1 PM | ✅ Both in office |
| 10 AM | 2 PM | ✅ Both in office |
| 11 AM | 3 PM | ✅ Both in office |
| 12 PM | 4 PM | ✅ Both in office |
| 1 PM | 5 PM | 🟡 They're awake |
| 2 PM | 6 PM | 🟡 They're awake |
| 3 PM | 7 PM | 🟡 They're awake |
| 4 PM | 8 PM | 🟡 They're awake |
| 5 PM | 9 PM | 🟡 They're awake |
| 6 PM | 10 PM | 🔴 They're sleeping |
| 7 PM | 11 PM | 🔴 They're sleeping |
| 8 PM | 12 AM | 🔴 They're sleeping |
| 9 PM | 1 AM | 🔴 They're sleeping |