What Is a World Clock?
A world clock is a tool that displays the current time in multiple timezones simultaneously. The TimerClockify world clock uses the Intl.DateTimeFormat API and your device's system clock to show accurate local time in over 100 IANA timezones — from UTC-12 (Baker Island) to UTC+14 (Line Islands). It updates every second in real-time.
How to Use the TimerClockify World Clock
- Open TimerClockify and navigate to the Clock tool. The interface displays your local system time by default.
- Use the searchable timezone dropdown to find any city or region. Type a city name or scroll through the grouped list.
- Toggle between 12-hour (AM/PM) and 24-hour display formats using the format switch.
- Enable or disable the date display to show the current date alongside the time.
- The clock updates every second in real-time — no manual refresh needed.
TimerClockify World Clock is a free online tool for checking the current time in over 100 IANA timezones worldwide. It uses your device's system clock and the browser's Intl.DateTimeFormat API for accurate time display. Features include a searchable timezone selector, 12-hour and 24-hour format toggle, optional date display, and real-time second-by-second updates. No installation or sign-up required.
Who Uses the TimerClockify World Clock?
- Remote Teams — Check colleague availability across timezones before scheduling meetings.
- International Travelers — Plan itineraries and track departure/arrival times in different regions.
- Stock Traders — Monitor market open/close times in New York, London, Tokyo, and Sydney.
- Freelancers — Coordinate deadlines with clients in different countries and time zones.
- Families — Stay connected by checking the local time for relatives living abroad.
Frequently Asked Questions About World Clocks
How many timezones does TimerClockify support?
TimerClockify supports over 100 IANA timezones, covering all major cities and regions worldwide — from UTC-12 (Baker Island) to UTC+14 (Line Islands). The timezone list follows the IANA Time Zone Database (also known as the tz database), which is the same standard used by operating systems and programming languages.
Is the time display accurate?
Yes. The TimerClockify world clock reads time from your device's system clock, which syncs with NTP (Network Time Protocol) servers. The display updates every second using the browser's Intl.DateTimeFormat API, ensuring accurate time conversion between any two timezones without manual calculation.
Does the world clock account for Daylight Saving Time?
Yes. Because TimerClockify uses IANA timezone identifiers (e.g., 'America/New_York' rather than 'EST'), it automatically handles Daylight Saving Time transitions. When a timezone switches between standard and daylight time, the displayed time adjusts accordingly.
Can I view multiple timezones at once?
The current version displays one timezone at a time with instant switching via the searchable dropdown. A multi-timezone comparison view is planned for a future update, allowing side-by-side time display for frequently used timezones.
What is the difference between UTC and GMT?
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) represent the same time in practice, but they differ technically. UTC is an atomic-clock-based time standard used by computers and networks worldwide. GMT is an astronomical time standard based on Earth's rotation. TimerClockify uses UTC as its reference standard for timezone offset calculations.