Time Zone Converter
Convert date and time between 400+ IANA timezones with DST awareness and multi-zone comparison.
Time zone converter
Updates as you type · DST-awareExamples
How It Works
Intl API) to convert any date and time between timezones accurately.How conversion works: The calculator determines the UTC equivalent of your source time by accounting for the source timezone's UTC offset (including DST if applicable), then converts that UTC moment to the target timezone(s). This ensures accurate results even across Daylight Saving Time transitions.
Multi-zone comparison: You can add up to 5 target timezones to see the same moment converted simultaneously. This is useful for scheduling meetings across multiple offices or coordinating with international teams.
DST awareness: The converter automatically detects whether Daylight Saving Time is in effect for each timezone at the specified date. The DST column shows "Yes" when DST is active, helping you understand any unexpected offset differences.
Auto-detection: Your local timezone is automatically detected and set as the default source timezone.
Tips & Best Practices
Frequently Asked Questions
How does the converter handle Daylight Saving Time?
The converter uses the browser's IANA timezone database, which includes all historical and current DST rules. When you select a specific date, the converter applies the correct UTC offset for that date, automatically handling DST transitions.
Why are there 400+ timezones?
The IANA timezone database tracks every region that has ever had different time rules. Even within the same current UTC offset, cities may have different historical DST rules. Using IANA zones ensures accuracy for both current and past dates.
Can I compare more than 2 timezones at once?
Yes, click 'Add Another Zone' to add up to 5 target timezones. All conversions are calculated from the same source time, making it easy to compare multiple cities simultaneously.