🌍 Time Zone Calculator
Convert time between different time zones worldwide. Schedule meetings, plan international calls, and coordinate across global time zones with automatic daylight saving time support.
🎯 Converted Time
11:30 AM
Pacific Time (PT)
🌍 World Clock
📊 Meeting Analysis
💡 Scheduling Tips
🌍 Major Time Zones
| Time Zone |
UTC Offset |
DST Period |
Major Cities |
| 🌴 Pacific (PT) |
UTC-8/-7 |
Mar-Nov |
LA, SF, Seattle |
| 🏔️ Mountain (MT) |
UTC-7/-6 |
Mar-Nov |
Denver, Phoenix |
| 🏙️ Central (CT) |
UTC-6/-5 |
Mar-Nov |
Chicago, Dallas |
| 🗽 Eastern (ET) |
UTC-5/-4 |
Mar-Nov |
NYC, Miami |
| 🇬🇧 GMT/BST |
UTC+0/+1 |
Mar-Oct |
London, Dublin |
🌍 Understanding Time Zones
Time zones are regions of Earth that observe a uniform standard time. They were created to coordinate schedules across different geographical locations and are typically based on 15-degree longitude intervals, representing one hour of time difference.
⏰ Time Zone Basics
| Concept |
Definition |
Example |
Impact |
| 🌍 UTC |
Coordinated Universal Time |
Global time standard |
Reference for all zones |
| ☀️ DST |
Daylight Saving Time |
Spring forward, fall back |
±1 hour seasonal shift |
| 📍 GMT |
Greenwich Mean Time |
London, UK baseline |
Historical UTC reference |
| 🕐 Offset |
Hours from UTC |
EST = UTC-5 |
Determines local time |
🌏 Global Time Zone Distribution
| Region |
Time Zones |
DST Practice |
Complexity |
| 🇺🇸 United States |
6 main zones |
Most states observe |
High (state variations) |
| 🇪🇺 Europe |
3 main zones |
EU-wide coordination |
Medium |
| 🇷🇺 Russia |
11 zones |
No DST since 2014 |
High (vast territory) |
| 🇨🇳 China |
1 zone (officially) |
No DST |
Low (political unity) |
| 🇦🇺 Australia |
3 main zones |
Some states only |
Medium |
📅 Daylight Saving Time Schedule
| Region |
Start Date |
End Date |
Time Change |
| 🇺🇸 USA/Canada |
2nd Sunday in March |
1st Sunday in November |
2:00 AM ± 1 hour |
| 🇪🇺 European Union |
Last Sunday in March |
Last Sunday in October |
1:00 AM ± 1 hour |
| 🇦🇺 Australia |
1st Sunday in October |
1st Sunday in April |
2:00 AM ± 1 hour |
| 🇳🇿 New Zealand |
Last Sunday in September |
1st Sunday in April |
2:00 AM ± 1 hour |
🏢 Business Meeting Best Practices
| Scenario |
Best Time (UTC) |
Participants |
Considerations |
| 🇺🇸 US Coast-to-Coast |
17:00-20:00 |
ET, CT, MT, PT |
Lunch/afternoon overlap |
| 🌍 US-Europe |
13:00-15:00 |
ET, GMT, CET |
Morning US, afternoon EU |
| 🌏 US-Asia |
22:00-01:00 |
PT, JST, CST |
Early/late hours required |
| 🌐 Global (3+ zones) |
Rotating schedule |
All major zones |
Share inconvenience |
📱 Time Zone Tools & Apps
| Tool Type |
Examples |
Features |
Best For |
| 📱 Mobile Apps |
World Clock Pro, TimeZone |
Multiple clocks, alarms |
Travelers, remote workers |
| 💻 Desktop Apps |
TimeZone Master, Clock |
System integration |
Office workers |
| 🌐 Web Tools |
TimeAndDate, WorldClock |
Meeting planners |
Quick conversions |
| 📅 Calendar Integration |
Google, Outlook, Apple |
Auto time zone detection |
Scheduling meetings |
💡 Time Zone Tips
- 📅 Use UTC for Scheduling: Avoid confusion by referencing UTC times
- 🔄 Account for DST: Check if locations observe daylight saving time
- 📱 Set Multiple Clocks: Keep clocks for key time zones visible
- ⏰ Confirm Meeting Times: Always confirm times in both zones
- 🌍 Consider Cultural Hours: Respect local business hours and customs
- 📊 Use Meeting Polls: Let participants vote on preferred times
- 🔄 Rotate Meeting Times: Share inconvenient hours fairly
- 📝 Include Time Zones: Always specify time zones in communications
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