Time Zone Converter - Free Online Tool

How This Tool Works

This converter uses the browser's Intl.DateTimeFormat API and the IANA Time Zone Database to convert a date and time from one time zone to another. All conversions account for daylight saving time (DST) automatically — you do not need to manually add or subtract DST offsets.

Useful for scheduling meetings across regions, converting event times for global audiences, calculating deadlines across time zones, or verifying server log timestamps.

How to Use

Select your date and time using the datetime picker in the input field.
Choose your source time zone (the zone the time is currently in) from the From dropdown.
Choose your target time zone (the zone you want to convert to) from the To dropdown.
Click Convert. The equivalent date and time in the target zone is shown, including whether DST is in effect.

Common Questions

Does this handle daylight saving time automatically?

Yes. The IANA Time Zone Database includes all historical DST transitions. The tool automatically determines whether DST is active for the selected date and adjusts accordingly. For example, converting New York time in January uses EST (UTC-5), while the same conversion in July uses EDT (UTC-4).

What is UTC and why does it matter?

UTC (Coordinated Universal Time) is the primary global time standard with no UTC offset and no daylight saving time. It is used in servers, APIs, and databases to avoid ambiguity. All other time zones are defined as offsets from UTC (e.g., India Standard Time is UTC+5:30).

What is the difference between GMT and UTC?

GMT (Greenwich Mean Time) and UTC share the same offset (0 hours) and are often used interchangeably in casual contexts. Technically, UTC is the atomic time standard used for most technical applications, while GMT is a time zone that observes BST (British Summer Time) in summer. For scheduling purposes, treat them as identical.