Timezone Converter

Convert time between world timezones

Developer Tools

How to Use Timezone Converter

  1. 1Enter a date and time
  2. 2Select the source timezone
  3. 3See the converted time in target timezones instantly

About Timezone Converter

Timezone Converter lets you instantly convert a date and time from one timezone to any other timezone in the world. Enter a time and a source timezone, and see the equivalent local time in your target timezone — with full IANA timezone support.

Remote teams, global meetings, API integrations, and scheduled deployments all require timezone-aware time handling. This tool handles DST (Daylight Saving Time) adjustments automatically using the browser's Intl API.

All conversion runs in your browser with no server required. The tool also shows the current time in any selected timezone, making it useful as a world clock for distributed teams.

Key Features of Timezone Converter

  • Convert time between any two IANA timezones instantly
  • Full IANA timezone database — all world regions supported
  • Handles DST (Daylight Saving Time) transitions automatically
  • View the current time in any timezone as a world clock
  • Shows UTC offset for each selected timezone
  • Works entirely in-browser using the Intl API
  • One-click copy for converted time values
  • Search timezones by city name or timezone identifier

Examples

Schedule a meeting between New York and London

Find the London equivalent of a 2 PM EST meeting time.

Input

2:00 PM America/New_York on a standard day

Output

7:00 PM Europe/London (UTC+0) / 8:00 PM during UK summer (BST, UTC+1)

Find the Tokyo time for a midnight UTC deployment

Determine when a midnight UTC deployment will appear in the Tokyo team's local time.

Input

00:00 UTC

Output

09:00 JST (Asia/Tokyo, UTC+9) — next morning in Tokyo

Common Use Cases

  • Scheduling global team meetings across multiple timezones
  • Determining the local time of a deployment window for on-call engineers worldwide
  • Converting API response timestamps from UTC to a user's local timezone
  • Planning international travel by checking arrival and departure times in local zones
  • Verifying cron job schedules account for the correct timezone
  • Checking when a live event or product launch happens in different regions

Troubleshooting

Converted time is off by one hour unexpectedly

Solution

The discrepancy is likely due to DST. Daylight Saving Time shifts clocks forward or backward seasonally. Check if the selected date falls in a DST period.

Timezone name is not recognized

Solution

Use IANA timezone identifiers (e.g., America/New_York, Europe/London, Asia/Tokyo). City names alone are not valid IANA identifiers.

UTC offset shown does not match what I expected

Solution

UTC offsets change during DST transitions. For example, America/New_York is UTC-5 in winter and UTC-4 in summer.

Frequently Asked Questions

How many timezones are supported?

All IANA timezones are supported using the browser Intl API, covering every region worldwide.

Does it handle Daylight Saving Time?

Yes. DST transitions are handled automatically by the Intl API. The conversion always reflects the correct offset for the selected date.

What is an IANA timezone?

IANA timezone identifiers are standardized names like America/New_York or Europe/London used in programming to represent timezones with their full historical DST rules.

What is the difference between UTC and GMT?

UTC and GMT refer to the same base time for most practical purposes. UTC is the modern scientific standard; GMT is the older colloquial term.

Can I compare more than two timezones simultaneously?

Select multiple target timezones to see the equivalent time in each — useful for scheduling meetings across multiple locations.

Why do some timezones have half-hour or quarter-hour offsets?

Some regions use non-standard offsets: India (UTC+5:30), Nepal (UTC+5:45), Iran (UTC+3:30). These are supported by the IANA database.

Is my data sent to a server?

No. All timezone conversion is performed locally using the JavaScript Intl.DateTimeFormat API.

What is the best timezone for scheduling global meetings?

UTC is the universal reference timezone. Scheduling in UTC avoids ambiguity from DST transitions and regional differences.