How to Use the Timezone Converter
Select your source time and timezone, then choose the target timezone. Click “Convert Time” to see the equivalent time in the destination zone. This tool is essential for scheduling international calls, planning travel, coordinating remote teams, and managing global projects.
Why Timezone Conversion Matters
With remote work becoming increasingly common, understanding timezone differences is crucial for business communication. A meeting scheduled for 9 AM New York time could be 10 PM in Tokyo. Misunderstanding timezone offsets can lead to missed meetings and frustrated colleagues.
Common Timezone Reference
- UTC/GMT: The global time standard, never adjusted for daylight saving
- US Eastern (ET): UTC-5 (EST) or UTC-4 (EDT during DST)
- US Pacific (PT): UTC-8 (PST) or UTC-7 (PDT during DST)
- China (CST): UTC+8, single timezone nationwide (no DST)
- UK (GMT/BST): UTC+0 (GMT) or UTC+1 (BST during DST)
- Japan (JST): UTC+9, no daylight saving
- Australia (AEST/AEDT): UTC+10 (AEST) or UTC+11 (AEDT during DST)
Daylight Saving Time (DST)
Daylight Saving Time complicates timezone conversion. The US, UK, Europe, and Australia observe DST (spring forward / fall back), while China, Japan, India, and many other countries do not. Our timezone converter automatically accounts for DST based on the current date.
Understanding Timezones: Complete Guide
The Earth is divided into 24 timezones, each 15 degrees of longitude wide. The reference point is Coordinated Universal Time (UTC). As the Earth rotates 360 degrees in 24 hours, each timezone represents a 1-hour difference from UTC.
Major Timezone Reference Table
| Timezone | Standard | DST | Example Cities |
|---|---|---|---|
| Hawaii (HST) | UTC-10 | None | Honolulu |
| US Pacific | UTC-8 | UTC-7 | Los Angeles, Seattle |
| US Mountain | UTC-7 | None (AZ) / UTC-6 | Denver, Phoenix |
| US Central | UTC-6 | UTC-5 | Chicago, Dallas |
| US Eastern | UTC-5 | UTC-4 | New York, DC, Toronto |
| UK (GMT/BST) | UTC+0 | UTC+1 | London, Dublin |
| Central Europe | UTC+1 | UTC+2 | Paris, Berlin, Rome |
| China (CST) | UTC+8 | None | Beijing, Shanghai |
| Japan (JST) | UTC+9 | None | Tokyo, Seoul |
| Australia Eastern | UTC+10 | UTC+11 | Sydney, Melbourne |
Daylight Saving Time (DST)
DST advances clocks during warmer months for longer evening daylight. US: second Sunday March to first Sunday November. Europe: last Sunday March to last Sunday October. China, Japan, India, and most African countries do not use DST.
Global Business Hours and Remote Work
For remote teams, finding overlapping hours is critical. New York (UTC-4 summer) and London (UTC+1): overlap 1-5 PM London / 8 AM-12 PM New York. Singapore (UTC+8) and London: overlap 2-5 PM Singapore time.
Interesting Timezone Facts
- China spans 5 geographical timezones but uses one nationwide (UTC+8)
- France has the most timezones (12, including overseas territories)
- Nepal uses UTC+5:45 – a 45-minute offset
- Some countries use half-hour offsets: India (UTC+5:30), Iran (UTC+3:30)
- The International Date Line zigzags to avoid splitting island nations