Time Zone Converter

Why use Time Zone Converter

• DST is handled automatically -- even for future dates where a clock change falls between now and the target date.
• Pre-fills with your local time and detected zone, so a quick check is one dropdown change away.
• Covers 40+ zones including half-hour and quarter-hour offsets (India UTC+5:30, Nepal UTC+5:45) that many converters skip.
• Labels whether daylight saving is active at the date you entered, not just today, so you never get caught by a seasonal shift.
• Uses the IANA time zone database via the browser's Intl API -- the same source of truth your operating system uses.
• No round-trip to a server. The conversion happens in your browser using built-in internationalization APIs.

How it works

The converter uses the JavaScript Intl.DateTimeFormat API backed by the IANA Time Zone Database. When you select a source zone and enter a date-time, the tool constructs a Date object anchored to that zone, then reformats it in the target zone using the timeZone option. The IANA database encodes historical and future DST transition rules, so the conversion automatically reflects whether either zone is observing daylight saving time at the selected date. UTC offsets are derived by comparing the formatted output against a UTC-anchored formatter.

About this tool

Scheduling a call with someone eight time zones away? Select the source zone, enter a date and time, pick the target zone, and get the converted result with UTC offsets and a flag showing whether daylight saving time is active. Pre-fills with your current local time so a quick conversion is one dropdown change away. Covers 40+ zones including half-hour offsets like India (UTC+5:30) and unusual ones like Nepal (UTC+5:45). The browser's Intl API powers the conversion using the IANA time zone database, so DST transitions are handled automatically -- even for future dates where a clock change falls between now and then. Google searches get the current offset right, but they struggle with future dates that cross a DST boundary. This tool does not.

How to use Time Zone Converter

1. Choose the source zone. Search or scroll to the time zone you are converting from. Your local zone is pre-selected.
2. Enter date and time. Set the specific date and time you need converted.
3. Choose the target zone. Search or scroll to the destination time zone.
4. Read the result. See the converted time, UTC offsets for both zones, and whether DST is active.

Use cases

• Remote team lead in New York scheduling a standup that works for colleagues in London, Bangalore, and Sydney.
• Podcast host confirming recording time with a guest overseas to avoid a missed call.
• Stock trader checking when the Tokyo Stock Exchange opens in their local time for pre-market prep.
• Event organizer publishing a global webinar start time in five time zones for the invite.
• Traveler setting an alarm for an early morning flight after landing in a new zone.
• Customer support manager mapping follow-the-sun shift handoffs to make sure there is no gap in coverage.