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Time Zone Converter

Converter

Conversion Results

Enter a date and time, then click Convert to see results.

About This Tool

Time Zone Converter – Convert Between Any IANA Time Zones

The Time Zone Converter lets you instantly translate a specific date and time from one geographic time zone into one or more target zones. Whether you are scheduling a video call with colleagues in Tokyo and London, comparing business hours across continents, or calculating when an international event airs in your local time, this tool provides accurate results by relying on the IANA (Olson) time zone database built into every modern browser.

How to Use the Converter

Enter a date and time in the input field, then select your source time zone — the zone the entered time belongs to. Next, choose one or more target time zones from the dropdown list, then click Convert. Each result shows the equivalent local time, the UTC offset (for example, UTC+5:30), and whether Daylight Saving Time is active in that zone for the selected date.

You can add up to 10 target time zones at once, making it easy to compare a single moment across an entire global team. The Swap button reverses the source and the first target zone, useful when you receive a meeting time in a foreign zone and want to know what it corresponds to locally.

Live Clock Mode

Enable the Live toggle to switch the converter into real-time world-clock mode. The input field locks to the current time and auto-refreshes every second, keeping all target-zone clocks continuously updated. This is ideal for keeping a persistent multi-city clock on screen while working across time zones.

Daylight Saving Time Handling

Daylight Saving Time (DST) shifts the clock forward by one hour during summer months in many countries. Because DST start and end dates differ by country — and some regions do not observe DST at all — manual offset calculation is error-prone. This converter resolves DST automatically: enter any date and the tool applies the correct offset for that exact moment, flagging active DST with an orange badge next to the result.

Understanding UTC Offsets

Every time zone is defined by its offset from Coordinated Universal Time (UTC). For example, UTC+9 means the local time is 9 hours ahead of UTC, while UTC-5 means it is 5 hours behind. Some zones have half-hour or quarter-hour offsets: India operates at UTC+5:30 and Nepal at UTC+5:45. This converter displays the precise offset string for every result, accounting for DST where applicable.

Supported Time Zones

The tool covers all major IANA time zone identifiers, including regions across Africa, the Americas, Asia, Australia, Europe, and the Pacific. Notable examples include:

  • America/New_York — Eastern Time (ET), UTC-5 / UTC-4 during DST
  • Europe/London — Greenwich Mean Time / BST, UTC+0 / UTC+1 during DST
  • Asia/Kolkata — India Standard Time, UTC+5:30 (no DST)
  • Asia/Tokyo — Japan Standard Time, UTC+9 (no DST)
  • Australia/Sydney — AEST / AEDT, UTC+10 / UTC+11 during DST

Common Use Cases

Remote team scheduling: Convert a proposed meeting time from your local zone to all team members' zones simultaneously to identify conflicts or unsociable hours before sending an invitation.

Travel planning: Enter your departure time to quickly determine what time you arrive in the destination zone, without mental arithmetic across time offsets.

Live event coverage: Convert broadcast start times — sports events, product launches, conference keynotes — to your local time so you never miss them.

Software and log analysis: Developers often work with UTC timestamps in server logs. This converter helps translate those timestamps into local times for context.

Copying and Sharing Results

Each result has an individual copy button that places the formatted time and UTC offset on your clipboard. The Copy All button at the top of the results panel exports every converted zone as a plain-text list, ready to paste into a calendar description, message, or document.

Frequently Asked Questions

Is the Time Zone Converter free?

Yes, Time Zone Converter is totally free :)

Can I use the Time Zone Converter offline?

Yes, you can install the webapp as PWA.

Is it safe to use Time Zone Converter?

Yes, any data related to Time Zone Converter only stored in your browser (if storage required). You can simply clear browser cache to clear all the stored data. We do not store any data on server.

How does the Time Zone Converter work?

The converter takes a date and time you enter along with a source IANA time zone, then uses the browser's built-in Intl.DateTimeFormat API to reinterpret that moment in one or more target time zones. It automatically accounts for Daylight Saving Time rules for the specific date, so the result is always contextually correct.

What time zones are supported?

The tool supports the full IANA time zone database (Olson database), including all regional identifiers such as America/New_York, Europe/London, Asia/Kolkata, and Pacific/Auckland. Over 400 named zones are available, grouped by region for easy browsing.

Does the tool handle Daylight Saving Time automatically?

Yes. DST transitions are handled automatically based on the date you enter. For example, converting a summer date from America/New_York will apply EDT (UTC-4) rather than EST (UTC-5), without any manual adjustment needed on your part.

Can I convert to multiple time zones at once?

Yes. You can add up to 10 target time zones and see all converted times simultaneously. Each result row shows the local date, time, UTC offset, and whether DST is currently active in that zone. This is ideal for scheduling meetings or coordinating across global teams.

How accurate are the conversions?

Conversions rely on the IANA time zone data embedded in your browser's JavaScript engine, which is regularly updated via OS and browser updates to reflect political time zone changes and DST rule amendments. Results are accurate to the second for any date within the supported JavaScript date range (years 1970–9999).

What is a UTC offset, and why does it change?

A UTC offset shows how many hours and minutes a time zone is ahead of or behind Coordinated Universal Time. For example, UTC+5:30 means 5 hours 30 minutes ahead of UTC. The offset changes for many zones twice a year when Daylight Saving Time begins or ends, typically shifting by one hour.