London is 5 hours ahead of Toronto for most of the year. For a few weeks in spring and fall the gap is 4 hours, because the two places change their clocks on different dates. Updated for the 2026 time zone changes and current daylight saving rules.
| Starting | London is | Toronto / London |
|---|---|---|
| Nov 1, 2026 | 5 hours ahead | UTC−5 / UTC+0 |
| Mar 14, 2027 Toronto springs forward | 4 hours ahead | UTC−4 / UTC+0 |
| Mar 28, 2027 London springs forward | 5 hours ahead | UTC−4 / UTC+1 |
| Oct 31, 2027 London falls back | 4 hours ahead | UTC−4 / UTC+0 |
| Nov 7, 2027 Toronto falls back | 5 hours ahead | UTC−5 / UTC+0 |
Eastern Time. UTC−5 in winter and UTC−4 from the second Sunday in March to the first Sunday in November.
UK time. GMT (UTC+0) in winter and BST (UTC+1) from the last Sunday in March to the last Sunday in October.
A 9-to-5 workday overlaps for 3 hours: 9:00 AM to 12:00 PM in Toronto, which is 2:00 PM to 5:00 PM in London.
London is 5 hours ahead of Toronto for most of the year. For a few weeks in spring and fall the gap is 4 hours, because the two places change their clocks on different dates.
Toronto uses Eastern Time: UTC−5 in winter and UTC−4 from the second Sunday in March to the first Sunday in November. London uses UK time: GMT (UTC+0) in winter and BST (UTC+1) from the last Sunday in March to the last Sunday in October.
A 9-to-5 workday overlaps for 3 hours: 9:00 AM to 12:00 PM in Toronto, which is 2:00 PM to 5:00 PM in London.