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Convert time between 30+ timezones, track multiple world clocks, and schedule international meetings with business hours detection.
Track time across multiple cities and timezones
UTC -5:00
UTC +0:00
UTC +9:00
Support for all major timezones including US, Europe, Asia, Australia, and more. Covers 99% of world population.
Live clock updates every second. Always shows accurate current time for all selected timezones.
Schedule international meetings with business hours detection. Find optimal times for global teams.
Automatically handles daylight saving time changes. Always accurate regardless of season.
Track unlimited cities simultaneously. Perfect for remote teams and international businesses.
Convert time between any two timezones instantly. No page reload or waiting required.
Time zones are regions of Earth that have the same standard time. The world is divided into 24 primary time zones, each roughly 15 degrees of longitude apart. Time zones help coordinate activities across different geographical locations and ensure that noon occurs when the sun is approximately at its highest point in the sky.
UTC is the primary time standard by which the world regulates clocks and time. It's not affected by daylight saving time and serves as the reference point for all other timezones. All timezones are expressed as offsets from UTC (e.g., UTC+5:30, UTC-8).
Common UTC Offsets:
Daylight Saving Time is the practice of advancing clocks by one hour during warmer months to extend evening daylight. Not all countries or regions observe DST. When DST is active, timezone abbreviations often change (e.g., EST becomes EDT, PST becomes PDT).
DST Facts:
Standard business hours are typically 9:00 AM to 5:00 PM, Monday through Friday, in the local timezone. When scheduling international meetings, it's important to find times that fall within business hours for all participants. Our Meeting Planner automatically highlights which times are within business hours for each location.
The International Date Line is an imaginary line on Earth's surface located at approximately 180° longitude. When you cross this line, the date changes by one day. This is why some Pacific islands can be a full day ahead of or behind neighboring regions despite being geographically close.
Select your source timezone and target timezone, enter the time and date you want to convert, and the calculator instantly shows the converted time. You can also add multiple world clocks to track time across different cities simultaneously.
Yes! The calculator automatically accounts for daylight saving time (DST) changes in regions that observe it. It uses your browser's timezone data to ensure accurate conversions year-round.
Use the Meeting Planner tab to add participant timezones, set your preferred meeting time, and the calculator shows the local time for each participant. It also indicates whether the time falls within business hours (9 AM - 5 PM) for each location.
When scheduling meetings, always include the timezone (e.g., "3 PM EST" or "15:00 UTC"). This prevents confusion and ensures everyone joins at the correct time.
For international teams, consider using UTC as the standard reference time. It's not affected by DST and is universally understood.
Remember that DST transitions happen on different dates in different regions. The US changes in March/November, while Europe changes in March/October.
For recurring meetings with global participants, rotate meeting times so the inconvenience is shared fairly among all team members.
Modern calendar apps (Google Calendar, Outlook) automatically convert meeting times to each participant's timezone. Always use these features for invitations.
Try to schedule meetings during overlapping business hours. Use our Meeting Planner to find times that work for all participants.
Add world clocks for your key locations (team members, clients, offices) to quickly check if it's a good time to reach out.
Always verify timezone conversions, especially for important meetings or deadlines. A simple mistake can cause missed meetings or late deliveries.
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