What is a Timezone Converter?
A timezone converter lets you translate a specific date and time from one timezone to another. This is essential for scheduling meetings across regions, coordinating international teams, planning travel, or simply understanding when a livestream or event starts in your local time.
How World Clocks Work
The world clocks feature lets you add multiple live clocks for different timezones. Choose from three display styles: a classic digital display with blinking separator, a traditional analog face with hour/minute/second hands, or a clean minimal numeric view. Your clocks are saved in your browser's localStorage so they persist between visits.
Understanding Timezones
The world is divided into timezone regions defined by the IANA timezone database (also called the tz database or Olson database). Each entry like America/New_York or Asia/Tokyo captures not just the current offset from UTC, but also historical changes and daylight saving time rules. This tool uses the Intl API built into your browser, ensuring accurate and up-to-date conversions.
Frequently Asked Questions
Does this tool handle daylight saving time (DST)?
Yes. Because the tool uses the IANA timezone database via your browser's Intl API, it automatically accounts for DST transitions. If you convert a time during a DST period, the offset will reflect the active DST rules for that timezone.
What is UTC?
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It does not observe daylight saving time and serves as the reference point for all other timezones. UTC+0 is equivalent to GMT (Greenwich Mean Time).
Are my saved clocks stored anywhere?
Your world clocks are stored only in your browser's localStorage. Nothing is sent to any server. If you clear your browser data, your saved clocks will be removed.
How accurate is the time displayed?
The clocks update every second using your system clock. The accuracy depends on your device's clock synchronization. Modern operating systems sync with NTP (Network Time Protocol) servers, typically keeping time accurate to within a few milliseconds.