Two clock-change calendars
Toronto mornings can line up with London afternoons. Their seasonal transition dates can differ, temporarily changing the expected gap. If a call is anchored to Toronto time, review how it appears in London during the transition weeks and around the end of the UK workday.
Toronto, CA: America/Toronto (city ID: toronto).
London, GB: Europe/London (city ID: london).
Does the difference change?
The destination-minus-source differences sampled on the 15th of each month in 2027 are +4h, +5h. These are dated examples, not a promise of fixed offsets or a complete historical range. A different reference date may have different rules.
| Source date | Toronto | London |
|---|---|---|
| 2027-01-16 | 10:00 Eastern Standard Time | 2027-01-16 · 15:00 Same day · Greenwich Mean Time |
| 2027-07-16 | 10:00 Eastern Daylight Time | 2027-07-16 · 15:00 Same day · British Summer Time |
Daylight-saving rules depend on the city and date. When a local hour is missing or repeated, the converter rejects it or asks which occurrence you mean. Rules can change politically; reconfirm far-future meetings.