Tool
Daylight Saving Tracker
Every DST transition in your city list for the next 12 months, with a precise UTC instant for each.
What makes this different
Three details set this apart from the generic "DST dates" tables online:
- Per-city precision: the shift instant is computed from the Intl database at hourly resolution, not from a static "second Sunday of March" formula. This matters because countries occasionally redefine their rules (Brazil did, Morocco did, Egypt did).
- Direction-aware warnings: spring-forward shifts destroy a local hour (02:00-03:00 does not exist); fall-back shifts duplicate a local hour. The tool flags both.
- "Critical hour" filter: if any shift falls inside the next 30 days, the top of the page highlights it.
How to use it
- Pick the cities you want to monitor.
- Read the calendar: each entry shows the UTC instant, the local time before and after the shift, and whether the clocks jump forward or back.
- Use the "next 30 days" filter to focus on what is imminent.
- Hover any entry to see the offset change in minutes.
If you schedule anything more than a week ahead, DST will eventually bite you. This tool projects every DST shift for every city you select over the next twelve months and tells you, in UTC, exactly when the local clock will jump. It also tells you whether each shift is a "spring forward" (lose an hour) or "fall back" (gain an hour), because the direction matters for any meeting that sits close to the rollover.
Frequently asked questions
Why does the tool sometimes show a shift that did not happen historically?
If a country reversed a DST policy (for example Samoa skipped 30 December 2011 to switch from UTC-11 to UTC+13), the historical calendar will show the unusual shift. We show what your browser's Intl database currently believes.
Why is the time listed as 02:00 or 03:00 rather than midnight?
Most countries switch DST at 02:00 or 03:00 local time, when most people are asleep and the disruption is smallest. The exact local switch time depends on the country's policy.
Does this tool account for permanent offset changes (e.g. Russia 2014)?
Yes. If a city permanently shifts its standard offset (with or without DST), your browser's Intl database captures it and the tracker shows the moment the local wallclock changes.