Timezone Calculator - Convert Time Between Timezones Online
Free online timezone calculator to convert time between different timezones. Perfect for international meetings and travel planning.
Timezone Conversion
Timezone Results
Enter date, time, and timezones to convert
About Timezone Calculator
The Timezone Calculator helps you convert time between different timezones for international communication and travel.
Common Timezones:
- UTC/GMT: Coordinated Universal Time (Greenwich Mean Time)
- EST/EDT: Eastern Standard/Daylight Time (UTC-5/-4)
- CST/CDT: Central Standard/Daylight Time (UTC-6/-5)
- MST/MDT: Mountain Standard/Daylight Time (UTC-7/-6)
- PST/PDT: Pacific Standard/Daylight Time (UTC-8/-7)
International Timezones:
- CET/CEST: Central European Time (UTC+1/+2)
- EET/EEST: Eastern European Time (UTC+2/+3)
- JST: Japan Standard Time (UTC+9)
- IST: India Standard Time (UTC+5:30)
- AEST/AEDT: Australian Eastern Time (UTC+10/+11)
Daylight Saving Time:
- Some regions observe daylight saving time
- Clocks move forward in spring, back in fall
- Not all countries observe DST
- Dates vary by country and region
Applications:
- International meetings and calls
- Travel planning
- Remote work coordination
- Event scheduling
- Business communications
Important Notes:
- Always specify timezone when scheduling
- Consider daylight saving time changes
- Some regions have half-hour offsets
- International Date Line affects date changes
Note: This calculator provides approximate conversions. For precise scheduling, always verify with official timezone databases and consider local daylight saving time rules.
Frequently Asked Questions
What is a timezone?
A timezone is a region of the Earth that observes a uniform standard time for legal, commercial, and social purposes. Timezones are based on longitude and can vary by country.
How do I convert between timezones?
Enter the date, time, and select the source and destination timezones. The calculator will show the converted time and time difference.
What's the difference between UTC and GMT?
UTC (Coordinated Universal Time) is the modern standard, while GMT (Greenwich Mean Time) is the older term. They are essentially the same for most practical purposes.
Why do some timezones have half-hour offsets?
Some countries use half-hour offsets (like India's UTC+5:30) for historical or practical reasons, often to align with local sunrise/sunset times.
How does daylight saving time affect conversions?
Daylight saving time changes the offset by one hour. Some regions observe DST while others don't, so the time difference can vary throughout the year.