Quick answer: Because daylight saving dates follow fixed rules, we already know the 2027 clock-change dates. The US springs forward on March 14, 2027 and falls back on November 7, 2027. The UK and EU spring forward on March 28, 2027 and fall back on October 31, 2027. Australia's DST states resume on October 3, 2027 and end on April 4, 2027. Marking these now means no missed transatlantic meetings and no surprises when the clocks move.
Times stay right through every change: Open BestSyncTime - it applies each region's DST rules automatically, so you never have to track the dates by hand.
Why you can plan a year ahead
Daylight saving isn't decided year by year on a whim - each region follows a fixed rule tied to specific Sundays. That means the 2027 dates are already determined, and you can put them on your calendar today. Knowing them in advance is genuinely useful if you coordinate across the Atlantic or the Pacific, because it lets you anticipate the "danger windows" when regions are out of sync before they catch you out.
The 2027 dates by region
| Region | Rule | Spring forward | Fall back |
|---|---|---|---|
| United States & Canada | 2nd Sun Mar -> 1st Sun Nov | March 14, 2027 | November 7, 2027 |
| UK, Ireland & EU | last Sun Mar -> last Sun Oct | March 28, 2027 | October 31, 2027 |
| Australia (DST states) | 1st Sun Oct -> 1st Sun Apr | Resumes October 3, 2027 | Ends April 4, 2027 |
| New Zealand | last Sun Sep -> 1st Sun Apr | Resumes September 26, 2027 | Ends April 4, 2027 |
As always, the Southern Hemisphere runs the opposite schedule - Australia and New Zealand "fall back" in April and "spring forward" in September-October, because their seasons are reversed.
The 2027 danger windows
The most useful thing to note in advance is when the US and Europe will be out of sync, because that's when transatlantic meetings go wrong. In 2027:
Spring danger window: March 14-28, 2027. The US springs forward on March 14, but Europe waits until March 28 - a two-week gap. During these two weeks, the New York-London gap shrinks from 5 hours to 4, and recurring transatlantic meetings silently shift by an hour.
Autumn danger window: October 31 - November 7, 2027. Europe falls back on October 31, but the US doesn't until November 7 - a one-week gap. Again the US-Europe gap is temporarily 4 hours instead of 5.
Note the spring gap in 2027 is two weeks (versus three weeks in 2026), because the calendar dates fall differently - another reason not to rely on memory from year to year.
Which regions still don't observe DST
For completeness, the major places that will *not* change their clocks in 2027 include most of Asia and Africa - India, China, Japan, and Russia keep fixed offsets year-round - plus holdouts like Arizona and Hawaii in the US, and Queensland, Western Australia, and the Northern Territory in Australia.
Bear in mind the DST map can shift year to year - reforms are under active debate in the US (Sunshine Protection Act) and the EU (which voted to end changes back in 2018 but never implemented it). So while the 2027 dates above reflect current rules, it's always worth confirming closer to the time in case a region changes its law.
How to use these dates
A few practical moves to make now:
1. Add the four key transition dates to your calendar as all-day reminders: March 14 and November 7 (US), March 28 and October 31 (EU/UK). 2. Flag the danger windows - March 14-28 and October 31 - November 7, 2027 - if you work US-Europe, so you'll double-check cross-border meetings those weeks. 3. Anchor recurring meetings to a time zone (or UTC) rather than a bare clock time, so your calendar handles the shifts automatically. 4. Re-confirm standing meetings around each transition, especially transatlantic ones during the danger windows.
Never track the dates manually: use BestSyncTime - it already knows each region's 2027 DST rules, so your times are correct through every change without you memorizing a single date.
The bottom line
Because daylight saving follows fixed rules, the 2027 dates are already set: the US changes on March 14 and November 7; the UK and EU on March 28 and October 31; Australia's DST states on October 3 and April 4. The US-Europe danger windows fall on March 14-28 and October 31 - November 7. Mark these now, anchor your recurring meetings to a time zone, and flag the danger weeks - and you'll sail through 2027's clock changes without a single missed meeting.
Stay ahead of every 2027 change: Open BestSyncTime, add your cities, and get times that already reflect the year's daylight-saving shifts.