London vs. Kolkata time difference

London is 4 hours, 30 minutes behind Kolkata

London UKKolkata India
Fri 12:27 pm

BST (UTC/GMT +1)
Fri 04:57 pm

IST (UTC/GMT +5:30)
7 am11:30 am
9 am1:30 pm
11 am3:30 pm
1 pm5:30 pm
3 pm7:30 pm
5 pm9:30 pm
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Time difference between London UK and Kolkata India is 4:30 hours

Kolkata doesn't observe daylight saving time but London does. DST in London started on 31 March 2019 and will end on 27 October 2019. Once DST ends in London the time difference between London and Kolkata will be 5:30 hours.