Time Zone Converter
Convert times between time zones instantly. DST-aware with business hours overlap finder. 100% client-side.
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Frequently Asked Questions
How does this tool handle Daylight Saving Time (DST)?
This converter uses the browser's native Intl.DateTimeFormat API which is automatically aware of DST transitions. When you pick a date during DST, offsets adjust accordingly.
What is UTC and why is it used as a reference?
UTC (Coordinated Universal Time) is the global time standard. It does not observe DST. All time zones are expressed as offsets from UTC, making it the ideal reference point for international coordination.
How do I find overlapping business hours for a meeting?
Add all participant time zones, then check the Meeting Slot Finder section. It highlights hours that fall within 9 AM–5 PM across every selected zone, showing you the best times to schedule.
Why do some timezone abbreviations change throughout the year?
Abbreviations like EST/EDT or CET/CEST change when a region enters or exits Daylight Saving Time. The abbreviation reflects the current offset rule in effect for that date.