DST Change Tracker

How this is actually calculated

Rather than relying on a hardcoded list of DST rules (which change more often than people expect — countries adjust or abolish daylight saving with only a year or two of notice), this tool checks your browser's own timezone database day by day across the chosen year, watching for the exact moment the UTC offset changes. That means it stays accurate as long as your browser's timezone data does, without needing a manual update here every time a country changes its policy.

Scheduling something across a DST transition? Double-check the exact local time using the Meeting Time Planner or the Timezone Comparison tool.