About the Time Zone Converter
Coordinating meetings, calls, or flight arrivals across time zones is complicated further by daylight saving time, which shifts on different dates (or not at all) depending on the country — a simple fixed UTC offset conversion can be wrong by an hour during transition periods.
This converter uses your browser's built-in IANA time zone database rather than hardcoded offsets, meaning it automatically applies the correct daylight saving rules for the specific date you're converting, not just the current date.
Frequently Asked Questions
Why does the time difference between two cities sometimes change during the year?
Daylight saving time transitions happen on different calendar dates in different countries (and some countries don't observe it at all), which can temporarily shift the effective time difference between two locations by an hour.
Does this work for dates far in the future?
It calculates based on currently known time zone rules. If a country changes its time zone or DST policy in the future, historical conversions using current rules may not reflect that change.
What does IANA time zone database mean?
It's the standard, regularly-updated reference database of the world's time zones and their historical and current DST rules, used by virtually all major operating systems and browsers.