Time Zone Converter — FAQ
Instant World Time Conversion — Frequently Asked Questions
All standard IANA time zones are supported (300+), including major cities and UTC offsets. The converter uses your browser's built-in Intl API for accuracy.
Yes. The converter automatically accounts for DST transitions. The UTC offset shown reflects the current DST status of each time zone.
Unix timestamp (seconds and milliseconds), ISO 8601 (UTC and local), and RFC 2822 date format.
Yes. Upload a CSV file with times and time zones to convert them all at once.
Your system time zone is auto-detected and shown as the default source time zone.
The converter helps find overlapping business hours across time zones, making it easy to schedule international meetings.
All time calculations happen in your browser using the JavaScript Intl API. No data is sent to any server.
Multiple cities can share the same UTC offset but observe different DST rules. The converter uses IANA zone names for accuracy.