Live clocks for Toronto and London, the exact difference as it stands today, a converter preset to this pair, and the full 24-hour comparison table — daylight saving handled on both sides.
Converting from Toronto time
The full day in Toronto on today, with the matching time in London:
| Toronto | London |
|---|
Both clocks above are read live from the IANA time-zone database built into your browser — the same rule set your phone uses. “Difference today” is not a fixed fact about this pair of cities: it is computed from the two zones’ offsets right now, which is why it can legitimately read differently if you open this page in a different month.
London is 5 hours ahead of Toronto for most of the year. Canada follows the US clock-change dates (second Sunday of March, first Sunday of November) while the UK changes on the last Sundays of March and October — so for about three weeks in March, and one week in the autumn, the gap is 4 hours.
The 24-hour table walks the whole of today in Toronto, hour by hour, and prints the matching moment in London — including the rows where London is still on yesterday, or already on tomorrow, which are marked +1 day or −1 day. Those edge rows are exactly the ones people get wrong doing the maths in their head.
Convert any moment between 44 world time zones, with offsets and DST handled.
Free — try itOne shift in, exact hours, decimal hours and gross pay out.
Free — try itThe flagship weekly timesheet with overtime and Save My Week.
Free — try itLive clocks, today's difference and the 24-hour table for New York and London.
Free — try itLive clocks, today's difference and the 24-hour table for Los Angeles and New York.
Free — try itLondon is 5 hours ahead of Toronto for most of the year. Canada follows the US clock-change dates (second Sunday of March, first Sunday of November) while the UK changes on the last Sundays of March and October — so for about three weeks in March, and one week in the autumn, the gap is 4 hours.
2:00 PM — that is 9:00 AM in Toronto converted on a January day, when Toronto is on standard time (UTC−5) and London is on GMT (UTC+0). Check it any time with the converter above: the answer is worked out from the two zones’ offsets on the date you pick, so it stays right when the clocks change.
Yes, on the clock-change dates. London is 5 hours ahead of Toronto for most of the year. Canada follows the US clock-change dates (second Sunday of March, first Sunday of November) while the UK changes on the last Sundays of March and October — so for about three weeks in March, and one week in the autumn, the gap is 4 hours.
Like the New York route, the overlap is the Toronto morning against the London afternoon: 9:00 AM–1:00 PM in Toronto is 2:00–6:00 PM in London. The trap is the shoulder weeks in March and October, when a standing meeting quietly shifts an hour for one side only.
From timestamps and the IANA time-zone database inside your browser — the live rules for each zone, including daylight-saving start and end dates and southern-hemisphere seasons where relevant. Nothing is hard-coded: open this page on a clock-change day and the clocks, the difference and the 24-hour table all follow the new offsets automatically.
Two offsets and one subtraction — the same method the converter at the top of this page runs:
Take 9:00 AM in Toronto, on a January day, when Toronto is on standard time (UTC−5) and London is on GMT (UTC+0). Adding the pair’s difference for that date gives 2:00 PM in London. The subtlety is that the difference itself is date-dependent for most pairs: repeat the same conversion in a month when one city has changed its clocks and the answer moves by an hour. That is why this page never prints a single fixed “the difference is X” without the word today next to it.
Add this tool to your own website or blog — it is completely free, needs no sign-up, and always shows the latest version. Copy the code below and paste it into your page where you want the tool to appear. Keeping the small “Powered by Loona Automation” credit line under the embed helps keep this tool free — but you are free to style or remove it; the tool works either way.