Keeping 09:00 on the ET clock produces 2 different destination clock/date answers in 2026. The ranges below use ET calendar dates, including transition days.
London14:00Same date337 of 365 source datesLondon13:00Same date28 of 365 source dates
Dates in ET · 2026
London answer
Source → destination offsets
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Jan 1 – Mar 766 dates
14:00Same date
UTC−05:00 → UTC
Mar 8 – Mar 2821 dates
13:00Same date
UTC−04:00 → UTC
Mar 29 – Oct 24210 dates
14:00Same date
UTC−04:00 → UTC+01:00
Oct 25 – Oct 317 dates
13:00Same date
UTC−04:00 → UTC
Nov 1 – Dec 3161 dates
14:00Same date
UTC−05:00 → UTC
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does ET time become a different date in London?
Your complete source day: 2026-11-03. Each range shows which destination date to use.
00:00 · Same date19:00 · Next day
ET · 2026-11-0300:00–19:00UTC−05:00
→
London · 2026-11-0305:00–24:00UTC Same date
ET · 2026-11-0319:00–24:00UTC−05:00
→
London · 2026-11-0400:00–05:00UTC Next day
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
A year of time differences.
How London compares with ET throughout 2026.
2026
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
+5h
+4h
+5h
+4h
+5h
Both ET and London change their clocks in 2026. The chart shows whether those changes alter the difference.
These starts fit both working windows on every selected ET workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
ET to London: useful answers
Why is the ET to London difference sometimes 4 hours and sometimes 5 hours?
ET is 4h or 5h behind London in 2026, depending on the date. Both ET and London change their clocks in 2026. The chart shows whether those changes alter the difference.
Does the ET–London time difference change in 2026?
The published rules produce 5 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in ET on 2026-11-03 is 14:00 in London on 2026-11-03. This selected time stays on the same date in both places. Other times can cross midnight.
Can ET and London meet during working hours?
Your selected working windows share 3h on 2026-11-03. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.