Guide
Daylight Saving Time 2027: The complete guide for meeting planners.
Updated · ByThe Vibing Dev.
DST changes on different dates worldwide. A meeting set for "10 AM EST" in March becomes "10 AM EDT" — but your London colleague hasn't switched yet. Here is every 2027 transition date and how to avoid the chaos.
Reviewed for the 2027 season. Transition dates follow the same rules each year, and theplanner always computes DST for your exact meeting date, whatever the year.
2027 DST transition dates by region
| Region | Spring forward | Fall back |
|---|---|---|
| US & Canada | March 14, 2027 (2 AM → 3 AM) | November 7, 2027 (2 AM → 1 AM) |
| Europe (EU) | March 28, 2027 (1 AM UTC → 2 AM) | October 31, 2027 (2 AM UTC → 1 AM) |
| UK (GMT/BST) | March 28, 2027 (1 AM → 2 AM) | October 31, 2027 (2 AM → 1 AM) |
| Australia (AEST/AEDT) | October 3, 2027 (2 AM → 3 AM) | April 4, 2027 (3 AM → 2 AM) |
| New Zealand (NZST/NZDT) | September 26, 2027 (2 AM → 3 AM) | April 4, 2027 (3 AM → 2 AM) |
| Brazil | Not observing DST | — |
| Mexico | Most regions no longer observe DST | Border regions follow US rules |
Always confirm critical dates against the official IANA release; governments can change DST rules with limited notice.
The "gap weeks" that break meetings
Because regions switch on different dates, there are weeks each year when the offset between zones changes temporarily:
- March 14–28, 2027: the US is on EDT (UTC−4) while Europe is still on CET (UTC+1). The normal six-hour New York–Berlin gap becomes five hours, and the five-hour New York–London gap becomes four.
- October 31 – November 7, 2027: Europe has fallen back to CET (UTC+1) while the US is still on EDT (UTC−4). The same one-hour compression returns.
- April 4 – September 26, 2027: Australia and New Zealand are on standard time while the US and Europe are on DST, producing different offsets than the rest of the year.
A recurring meeting set for "10 AM ET / 3 PM GMT" in February becomes "10 AM ET / 2 PM GMT" during March 14–28. If you do not adjust, someone misses it. Test your exact corridor live:NY–London,NY–Delhi,London–Sydney — each recomputes for your date.
Regions that do not observe DST
These stay on standard time year-round — no spring or fall changes:
- US: Arizona (except Navajo Nation), Hawaii, Puerto Rico, Guam, American Samoa.
- Asia: Japan, China, India, Singapore, South Korea, Taiwan, Thailand, Vietnam, Philippines, Malaysia, Indonesia (most).
- Middle East: UAE, Saudi Arabia, Qatar, Kuwait, Bahrain, Oman, Iraq, Syria, Jordan.
- Africa: Most countries; Egypt and Morocco still observe DST.
- South America: Brazil, Argentina, Colombia, Peru, Ecuador.
How DST breaks your recurring meetings
- Calendar drift: a recurring "9 AM ET" invite sends 9 AM EDT after the spring change, but attendees in non-DST zones see it shift.
- Ambiguous abbreviations: "EST" vs "EDT", "CST" vs "CDT". Use IANA zones (
America/New_York) instead of abbreviations. - Day boundary shifts: 11 PM ET Friday is 3 AM GMT Saturday. After DST, it is 4 AM GMT, and the day changes.
- Half-hour offsets: India (UTC+5:30), Nepal (UTC+5:45), and Australia's Lord Howe Island (UTC+10:30) confuse converters that assume whole-hour offsets.
How this planner handles DST automatically
The World Clock Meeting Planner uses the browser's native Intl.DateTimeFormatAPI with the full IANA time zone database. This means:
- Every conversion uses the exact same database as your operating system.
- No hardcoded rules to go stale.
- Historical and future DST rules included.
- Fractional offsets (India, Nepal, Australia/Lord_Howe) handled natively.
- Shareable links encode the target date, so DST is calculated correctly for that specific date.
Best practices for DST-safe scheduling
- Always use IANA zones — search "New York", not "EST", in the planner.
- Set the planning date — the date picker ensures DST is calculated for the meeting day, not today.
- Share the planner link — not just a time. The link recalculates for any date.
- Export .ics, not plain text — calendar files store UTC, so recipients see the correct local time.
- Audit recurring meetings — check the March and October/November transitions each year.
2027 DST FAQ
When does daylight saving time start in 2027?+
In the United States and Canada, DST starts on March 14, 2027. In the European Union and the United Kingdom, it starts on March 28, 2027. Australia starts on October 3, 2027, and New Zealand starts on September 26, 2027.
When does daylight saving time end in 2027?+
US and Canada DST ends on November 7, 2027. The EU and UK end on October 31, 2027. Australia ends on April 4, 2027, and New Zealand also ends on April 4, 2027.
What are the 2027 DST gap weeks?+
The two US–Europe mismatch weeks are March 14–28, 2027 and October 31–November 7, 2027. During those weeks the New York–London offset is four hours instead of the usual five. The southern-hemisphere gap runs from April 4 to September 26, 2027, when Australia and New Zealand are on standard time while the US and Europe are on DST.
Does the meeting planner handle 2027 dates automatically?+
Yes. Every conversion runs through the browser's Intl API and the IANA time zone database, so selecting a 2027 meeting date applies the correct DST rule for each city. No hardcoded offsets are used.
2026 archive
For historical reference: in 2026, US DST ran March 8–November 1, Europe and the UK switched March 29 and October 25, Australia switched April 5 and October 4, and New Zealand switched April 5 and September 27.
Never debug DST math again.
Plan a meeting for any date in 2027 — the planner uses browser-native IANA data for accurate local times.
Open the World Clock Meeting Planner →Sources
- IANA Time Zone Database — authoritative zone and DST rules.
- NIST Daylight Saving Time — official US transition dates.
- timeanddate DST overview — cross-check for international dates.