Daylight Saving Time Countdown

Find out exactly when clocks next change (spring forward or fall back) in any time zone — calculated live using your browser's own time zone data.

Daylight Saving Time is one of the more contested pieces of modern timekeeping — it's observed by roughly 40% of countries worldwide, abandoned by others after trying it, and its actual usefulness for energy savings (the original justification when it was popularized during World War I) remains genuinely disputed by researchers today. Whatever you think of it, in the places that still observe it, clocks reliably shift forward in spring and back in autumn, on dates that vary by country and aren't always intuitive to remember.

That unpredictability is exactly the practical problem this tool solves — not the politics of whether DST should exist, but the simple question of when your own clocks will next change, so you're not caught off guard by a meeting that's suddenly an hour off, or a flight departure time that shifted relative to when you set your alarm.

Rather than relying on a fixed table of transition dates that would need manual updates every time a country's rules changed, this tool checks your browser's own built-in time zone data — the same database your operating system uses — and calculates the next actual transition date directly from it. That means it stays accurate automatically as rules shift over time, and it correctly reports "no transition found" for the many zones that don't observe Daylight Saving Time at all.

1. Pick a time zone (defaults to your own).
2. Press Find next change.
3. See the exact date of the next Daylight Saving Time transition, and how many days away it is.