DST Checker
for recurring meetings.
Model a standing invite across up to six time zones and we'll flag the exact dates it shifts an hour, the spring-forward and fall-back windows where one person's clock changes and the others haven't yet. Share one link so support, ops, and engineering all see the same timeline. Runs entirely in your browser. Nothing is uploaded.
Set the recurrence
Enter the meeting name, local start time, and how often it repeats. Weekly standups are the most common case, but daily, bi-weekly, and monthly all work.
Add every zone
List each participant's IANA time zone. Mixed US, EU, and AU teams are exactly where mismatches hit, because only one region transitions at a time.
Review & share
Scan the flagged shift dates, add calendar reminders, and copy the URL into Slack or a runbook so everyone sees the same dates.
Model shifts before they bite.
When recurring meetings drift in 2026
Daylight saving time doesn’t move every clock on the same day, and that’s the whole problem. The United States springs forward on Sunday, March 8, 2026, but the EU and UK wait until Sunday, March 29, 2026. For those three weeks, a recurring New York to London call that normally has a five-hour gap has only a four-hour gap, so the meeting lands an hour earlier or later than usual for one side.
The same mismatch happens in reverse each autumn. The EU and UK fall back on Sunday, October 25, 2026, a full week before the US on Sunday, November 1, 2026.
| Transition | United States | EU / UK | Mismatch window |
|---|---|---|---|
| Spring forward | Mar 8, 2026 | Mar 29, 2026 | 21 days |
| Fall back | Nov 1, 2026 | Oct 25, 2026 | 7 days |
Teams that span the Southern Hemisphere see it twice over. Australia and New Zealand shift in the opposite direction (their autumn is the Northern Hemisphere’s spring), so a Sydney to London call can move twice a year in opposite directions.
Reviewed for 2026. DST dates based on the IANA time zone database.
Frequently asked questions
How recurring invites drift, what the checker models, sharing links, and when to use schedule pages or the converter instead.
It models a recurring meeting, daily, weekly, bi-weekly, or monthly, across up to six time zones and flags the specific dates when daylight saving time shifts the local start time for one or more participants. You see the before and after time for each person and can add calendar reminders for every transition.