Timezone Converter

Convert date and time between 35+ world timezones instantly. Handles daylight saving time automatically using the Intl API. Free, private, runs entirely in your browser.

World Clock - Current Time in All Zones

TimezoneCurrent TimeOffset

Features

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35+ Timezones

Supports all major world timezones including UTC, US, Europe, Asia, Australia, Africa, and South America with IANA timezone identifiers.

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DST Aware

Automatically handles daylight saving time transitions using the browser's built-in Intl.DateTimeFormat API for accurate conversions.

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Live World Clock

See the current time in all supported timezones updated every second. Search and filter to find specific zones quickly.

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100% Private

All conversions happen locally in your browser. No data is sent to any server. Your time data stays completely private.

Understanding Timezones

Timezones divide the world into regions that observe the same standard time. The concept was formalized in the late 19th century with the adoption of a global system of 24 time zones, each offset from Coordinated Universal Time (UTC). Today, there are more than 24 distinct time offsets due to half-hour and quarter-hour variations in countries like India (UTC+5:30), Nepal (UTC+5:45), and parts of Australia.

How Timezone Conversion Works

Timezone conversion involves translating a date and time from one timezone to another. The process works by first converting the local time to UTC (by subtracting the source timezone's UTC offset), and then converting UTC to the target timezone (by adding the target's UTC offset). This tool uses the IANA Time Zone Database (also called the Olson database) through the browser's Intl.DateTimeFormat API, ensuring accurate handling of complex rules like daylight saving time transitions.

Daylight Saving Time (DST)

Many timezones observe daylight saving time, advancing clocks by one hour during summer months. DST transitions vary by country and can change from year to year based on legislation. This converter automatically accounts for DST by using the IANA timezone database, which contains the complete history and current rules for DST in every region.

Common Timezone Abbreviations

Frequently Asked Questions

How does this converter handle daylight saving time? ▼
This timezone converter uses the browser's Intl.DateTimeFormat API with IANA timezone identifiers, which automatically accounts for daylight saving time (DST) transitions. When you convert a time, the tool considers whether DST is active in each timezone at the specified date, ensuring accurate conversions year-round. The IANA timezone database is regularly updated to reflect changes in DST rules worldwide.
What is UTC and why is it important? ▼
UTC (Coordinated Universal Time) is the primary time standard used worldwide. It serves as the reference point from which all other timezones are calculated as positive or negative offsets. UTC does not observe daylight saving time, making it ideal for scheduling international meetings, logging server events, storing timestamps in databases, and coordinating activities across different timezones.
How many timezones does this converter support? ▼
This converter supports 35+ major timezones covering all populated continents, including UTC, all US time zones (Eastern, Central, Mountain, Pacific, Alaska, Hawaii), UK, Central and Eastern Europe, Moscow, Turkey, India, Nepal, Bangladesh, Thailand, China, Hong Kong, Singapore, Japan, South Korea, Australia (Eastern, Central, Western), New Zealand, Brazil, Argentina, Mexico, Dubai, Saudi Arabia, and several African zones.
Is this timezone converter accurate? ▼
Yes, this converter uses the browser's built-in Intl.DateTimeFormat API with IANA timezone database identifiers. This is the same data source used by operating systems, programming languages, and major software applications, ensuring accuracy for current timezone rules including all DST transitions. The browser updates its timezone database with each update.
Can I see the current time in all timezones at once? ▼
Yes, the World Clock section below the converter displays the current time in all 35+ supported timezones, updated every second. You can use the search box to filter the list by timezone name or region, making it easy to find specific zones quickly.
What is the difference between EST and ET? ▼
EST (Eastern Standard Time) refers specifically to UTC-5, used during winter months in the US Eastern timezone. ET (Eastern Time) is a general term covering both EST and EDT (Eastern Daylight Time, UTC-4), which is used during summer months. This converter automatically handles the switch between standard and daylight time based on the date you enter.

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