Free Time Zone Converter Convert Time Between Cities, Countries, UTC & GMT

• UTC (Coordinated Universal Time)
• GMT (Greenwich Mean Time)
• EST (Eastern Standard Time)
• CST (Central Standard Time)
• MST (Mountain Standard Time)
• PST (Pacific Standard Time)
• CET (Central European Time)
• IST (India Standard Time)
• JST (Japan Standard Time)
• AEST (Australian Eastern Standard Time)
• Asia/Manila (Philippines)
• Europe/London (United Kingdom)
• America/New_York (United States)

UTC (Coordinated Universal Time) is the global time standard used around the world.

Many countries adjust their clocks during summer using Daylight Saving Time (DST). This converter automatically accounts for these changes based on the selected date.

What is a time zone?

A time zone is a geographic region that observes the same standard time. Time zones are generally based on their offset from Coordinated Universal Time (UTC), allowing countries and cities around the world to keep consistent local time.

What is UTC?

Coordinated Universal Time (UTC) is the international time standard used worldwide. It serves as the reference point for calculating all other time zones and is widely used in aviation, navigation, computing, telecommunications, and scientific research.

What is GMT?

Greenwich Mean Time (GMT) is a traditional time standard based on the Royal Observatory in Greenwich, England. While UTC has replaced GMT for scientific purposes, the two are often treated as equivalent for everyday timekeeping.

What is Daylight Saving Time (DST)?

Daylight Saving Time (DST) is the practice of moving clocks forward during warmer months to extend evening daylight. Not every country observes DST, and the start and end dates vary by region.

Does this converter automatically apply DST?

Yes. Our Time Zone Converter automatically applies the correct Daylight Saving Time rules based on the selected date and the official IANA Time Zone Database used by your browser.

How many time zones are supported?

The converter supports more than 400 official IANA time zones covering countries, cities, territories, and regions around the world.

Can I convert future dates?

Yes. You can convert both future and past dates. The converter automatically applies historical and future time zone rules whenever available through your browser's international time zone database.

Can I convert past dates?

Yes. Historical time conversions are supported, making the tool useful for research, record keeping, scheduling, and reviewing previous events.

What is the IANA Time Zone Database?

The IANA Time Zone Database is the world's most widely used collection of official time zone information. It contains time zone names, UTC offsets, and Daylight Saving Time rules for locations worldwide and is maintained with regular updates.

Does the Time Zone Converter work offline?

Once the webpage has loaded, most modern browsers can perform time zone calculations locally using their built-in Internationalization API. However, an internet connection is required to initially access the converter.