Convert dates and times between different timezones instantly. Transform times across UTC, EST, PST, GMT, and other major timezones with daylight saving time support.
• Enter date and time in the "From" timezone
• Conversion accounts for daylight saving time
• Results show local time in both timezones
A timezone converter transforms dates and times from one timezone to another. With people working across different continents and countries, timezone conversion is essential for scheduling meetings, coordinating events, understanding timestamps, and working with global systems. A timezone converter handles the complex calculations of time differences, accounting for daylight saving time (DST) changes, and provides accurate conversions instantly.
Our free Timezone Converter supports major timezones worldwide, including UTC, US timezones (Eastern, Central, Mountain, Pacific), European timezones (London, Paris), Asian timezones (Tokyo, Shanghai), and Australian timezones. Simply enter a date and time, select source and target timezones, and get instant conversion results. The tool automatically accounts for daylight saving time and provides clear, formatted output.
Timezone conversion is essential in our globalized world. Whether you're scheduling international meetings, coordinating with remote teams, understanding server logs, booking travel, or working with global APIs, you need to convert times between timezones. Manual timezone conversion is error-prone, especially when accounting for daylight saving time changes that occur at different dates in different regions.
A timezone converter eliminates calculation errors, handles DST automatically, and provides instant results. It's invaluable for project management, event planning, software development (especially for distributed systems), and any scenario where accurate time coordination is critical.
UTC is the primary time standard by which the world regulates clocks and time. It's not adjusted for daylight saving time and serves as the reference for all other timezones. UTC is commonly used in computing, aviation, and international communication.
The United States has four main timezones:
Many regions adjust clocks forward in spring and back in fall. DST start and end dates vary by region, making manual conversion complex. Our converter automatically handles DST transitions.
Timezone conversion involves:
The browser's Intl API provides timezone-aware date formatting, automatically handling DST transitions and timezone rules.
Timezones are expressed as offsets from UTC:
Positive offsets are ahead of UTC (east), negative offsets are behind UTC (west). DST typically adds 1 hour to the offset.
Our timezone converter:
The converter automatically detects whether DST is active in each timezone based on the date. DST typically runs from spring to fall in most regions.
UTC and GMT are essentially the same for practical purposes. UTC is more precise and is the standard used in computing. GMT is a timezone, while UTC is a time standard.
Daylight Saving Time adds 1 hour to the standard offset. For example, EST is UTC-5, but EDT (during DST) is UTC-4.
Yes, the converter handles dates in the past and future, accounting for historical timezone changes and DST rules.
Conversions use the browser's timezone database, which is based on the IANA Time Zone Database. This is the same database used by most operating systems and is highly accurate.