World Time Zones — Convert Any Time Instantly
Enter a time and pick a source timezone to instantly see that moment across all major world timezones including your own.
How to use this tool
- Open this page — it runs instantly in your browser, no signup or install.
- Allow any permission prompt if asked; everything stays on your device.
- Use the on-screen controls — results update live.
Enter a time and pick a source timezone to instantly see that moment across all major world timezones including your own.
How it works
This widget lets you enter any time and select a source timezone, then instantly displays the equivalent time across all major world timezones. Rather than converting between just two zones, it gives you a global snapshot of what that moment looks like everywhere at once.
Select a source timezone from the dropdown and enter a time. The widget computes the UTC offset for each listed timezone -- including any Daylight Saving Time adjustments that apply on the selected date -- and shows the local equivalent time for each region.
This is particularly useful for scheduling international meetings, planning live events or streams, coordinating deployments across distributed teams, or simply understanding what time it is for friends and colleagues in different parts of the world.
Daylight Saving Time (DST) transitions mean that timezone offsets change on certain dates. This widget accounts for DST automatically, so a summer time in New York (EDT, UTC-4) versus winter (EST, UTC-5) will produce different results for the same clock time.
Worked example
Schedule a team call across three continents
- Set source timezone to 'America/New_York' and enter '10:00 AM'.
- The widget displays all major zones simultaneously.
- Read off: London = 3:00 PM, Berlin = 4:00 PM, Tokyo = 11:00 PM.
- Confirm all attendees are within working hours before booking.
10:00 AM New York = 3:00 PM London = 4:00 PM Berlin = 11:00 PM Tokyo.
Common mistakes to avoid
- Forgetting to account for DST when planning meetings months in advance -- a time that works in winter may be one hour off in summer.
- Assuming all countries in a region share the same offset -- countries like the US span multiple zones (Eastern, Central, Mountain, Pacific).
- Reading the output as the current time -- the widget converts the time you enter, not necessarily right now unless you enter the current time.
Key terms
- UTC offset
- The number of hours (and sometimes half-hours) a timezone is ahead of or behind Coordinated Universal Time.
- DST (Daylight Saving Time)
- A seasonal practice of advancing clocks one hour in spring and reverting in autumn, observed in many but not all countries.
- IANA timezone
- A standardized timezone identifier such as 'America/New_York' or 'Asia/Tokyo' that encodes both region and historical DST rules.
Frequently asked questions
- How does the world time zone converter work?
- Enter a time and source timezone, and we compute the exact UTC moment then display it in every major zone using the browser's Intl.DateTimeFormat API.
- Does it handle daylight saving time?
- Yes. The Intl API uses the full IANA timezone database and applies DST rules automatically.