Timezone Converter
Convert time between different world time zones
Professional timezone converter for business, travel, and scheduling. Perfect for international meetings, global operations, and travel planning.
World Time Zones
Greenwich, UK
New York, USA
Chicago, USA
Denver, USA
Los Angeles, USA
London, UK
Berlin, Germany
Helsinki, Finland
Moscow, Russia
Mumbai, India
Beijing, China
Tokyo, Japan
Sydney, Australia
Auckland, New Zealand
Honolulu, USA
Anchorage, USA
Compare business hours across different time zones for international meetings
How Time Zones Work
- Earth is divided into 24 time zones, each 15° longitude apart
- UTC (Coordinated Universal Time) is the global time standard
- Time zones are expressed as UTC+/- offset hours
- Daylight Saving Time shifts zones by +1 hour seasonally
Conversion Methods
- Convert to UTC first, then to target timezone
- Add/subtract offset hours from UTC time
- Account for date changes across International Date Line
- Consider Daylight Saving Time periods
UTC Explained
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It's based on atomic time and serves as the reference point for all other time zones.
- • Successor to Greenwich Mean Time (GMT)
- • Not affected by Daylight Saving Time
- • Used in aviation, computing, and science
- • Maintained by atomic clocks worldwide
Time Zone Offsets
Time zones are expressed as offsets from UTC, ranging from UTC-12 to UTC+14. These offsets represent the number of hours ahead or behind UTC.
International Date Line
The International Date Line roughly follows the 180° meridian and marks where each new day begins. Crossing it changes the date by one day.
- • Located in the Pacific Ocean
- • Deviates to avoid splitting countries
- • Westward crossing: +1 day
- • Eastward crossing: -1 day
International Meetings
- Schedule calls across multiple time zones
- Find optimal meeting times for global teams
- Avoid scheduling during non-business hours
- Plan webinars and virtual events
Global Operations
- Coordinate 24/7 support coverage
- Manage international project deadlines
- Synchronize global product launches
- Track financial market hours
Travel Planning
- Plan flight connections and layovers
- Schedule ground transportation
- Coordinate hotel check-ins
- Manage jet lag and sleep schedules