Boston vs London time difference
London is 4 h ahead
Boston 23:31 · London 03:31. From November 1 London will be 5 h ahead.
Boston now
23:31:54
Saturday, October 24UTC-4, EDT
London now
03:31:54
Sunday, October 25UTC+0, GMT
Convert a time
Using today's difference: 4 h. From November 1: 5 h.
When the difference changes
-
1Nov 2026
Boston moves its clocks one hour back in 8 days
The difference becomes 5 h: London ahead
-
14Mar 2027
Boston moves its clocks one hour forward
The difference becomes 4 h: London ahead
-
28Mar 2027
London moves its clocks one hour forward
The difference becomes 5 h: London ahead
-
31Oct 2027
London moves its clocks one hour back
The difference becomes 4 h: London ahead
-
7Nov 2027
Boston moves its clocks one hour back
The difference becomes 5 h: London ahead
Both cities change their clocks, on different dates.