🕐 TimeFYI

Timezone Converter

Convert times between any world time zones. Uses your browser's built-in Intl API for accurate timezone data including DST transitions.

Converter

Quick presets

How to Use

  1. 1
    Select time zones

    Choose the source and target time zones from the dropdown menus.

  2. 2
    Enter the time

    Type the date and time you want to convert, or click 'Now' to use the current time.

  3. 3
    Read the result

    View the converted time, time difference, and DST status for both zones.

About

Time zones were first proposed by Sir Sandford Fleming in 1879 after missing a train due to a confusing 12-hour clock timetable. Before standardized time zones, each city kept its own local solar time, making railway scheduling chaotic.

The International Meridian Conference of 1884 established the Greenwich meridian as the prime meridian and divided the world into 24 time zones. Today the IANA Time Zone Database (often called the Olson database) maintains the definitive list of time zones, including all historical changes and daylight saving time rules.

UTC replaced GMT as the world's time standard in 1972. Unlike GMT, UTC is based on atomic clocks and does not observe daylight saving time, making it the preferred reference for computing and aviation.

FAQ

What is UTC?
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. It is the successor to GMT and does not observe daylight saving time.
How does daylight saving time (DST) affect conversions?
This tool automatically accounts for DST using the IANA timezone database built into your browser. The offset shown reflects the current DST status of each zone.
Why are some time zones offset by 30 or 45 minutes?
Several countries use non-standard offsets. India (UTC+5:30), Nepal (UTC+5:45), and the Chatham Islands (UTC+12:45) are examples of zones with fractional hour offsets.
What are military time zones?
NATO uses letter designations for time zones: Z (Zulu) for UTC, A through M for east, and N through Y for west. Alpha is UTC+1, Bravo UTC+2, etc.
Does this account for DST automatically?
Yes. The converter uses the browser's Intl.DateTimeFormat API, which includes the full IANA timezone database with all historical and current DST rules.