Time Zone Converter
Convert times between different time zones around the world.
Why & What
Time zones exist because the Earth rotates, and different parts of the world experience daylight at different times. There are 24 main time zones, each roughly 15° of longitude wide.
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. Time zones are expressed as offsets from UTC (e.g., UTC+8 for China, UTC-5 for US Eastern).
Time Zone Converter
Educational Purpose Only: This calculator is provided for learning and educational purposes. For critical applications or professional use, please verify results with appropriate professional tools and expertise.
Common Time Zones
| Zone | UTC Offset | Major Cities |
|---|---|---|
| PST | UTC-8 | Los Angeles, Seattle, Vancouver |
| MST | UTC-7 | Denver, Phoenix |
| CST | UTC-6 | Chicago, Houston, Mexico City |
| EST | UTC-5 | New York, Toronto, Miami |
| UTC/GMT | UTC+0 | London, Lisbon, Reykjavik |
| CET | UTC+1 | Paris, Berlin, Rome |
| IST | UTC+5:30 | Mumbai, Delhi, Kolkata |
| CST (China) | UTC+8 | Beijing, Shanghai, Singapore |
| JST | UTC+9 | Tokyo, Seoul |
Limitations & Disclaimer
Important Limitations
- Does not automatically adjust for Daylight Saving Time.
- Some time zones have unusual offsets (e.g., Nepal is UTC+5:45).
- Time zone rules can change based on local legislation.
- For educational purposes only; verify critical time conversions.