Time Zone Converter
Convert times between any time zones worldwide. Perfect for scheduling international meetings and calls.
From
To
Current Times Around the World
Eastern Time (US)
08:55 PM
London (GMT)
01:55 AM
Tokyo (JST)
10:55 AM
Sydney (AEST)
12:55 PM
Quick Answer
Select your source time and time zone, then choose your target time zone to see the converted time instantly. The converter automatically accounts for Daylight Saving Time when applicable.
Dr. Snezana Lawrence
Mathematical Historian
15+ years experience
PhD from Yale University. Published mathematical historian ensuring precision in all calculations.
Education
PhD in Mathematical History - Yale University
Table of Contents
How to Use the Time Zone Converter
Converting times between time zones is simple with our tool:
- Select the Date: Choose the date for your conversion
- Enter the Time: Input the time you want to convert
- Choose Source Zone: Select your starting time zone
- Choose Target Zone: Select the time zone to convert to
- View Result: The converted time appears automatically
Use the swap button to quickly reverse the conversion direction.
Understanding Time Zones
Time zones were established to standardize timekeeping across the world. Key concepts:
UTC (Coordinated Universal Time)
The global time standard from which all time zones are calculated. UTC+0 is the reference point.
Time Zone Offsets
Time zones are expressed as offsets from UTC. For example, EST is UTC-5 (5 hours behind UTC).
International Date Line
Located roughly at 180° longitude, crossing this line changes the calendar date by one day.
Daylight Saving Time
Daylight Saving Time (DST) complicates time zone conversions:
- Spring Forward: Clocks move ahead 1 hour in spring
- Fall Back: Clocks move back 1 hour in autumn
- Not Universal: Many countries don't observe DST
- Different Dates: DST start/end dates vary by country
- Hemisphere Effect: Southern hemisphere has opposite DST timing
Our converter automatically accounts for DST based on the date you select.
Common Time Zone Conversions
| When it's noon in... | It's this time in... |
|---|---|
| New York (EST) | 5:00 PM in London, 2:00 AM (+1) in Tokyo |
| London (GMT) | 7:00 AM in New York, 9:00 PM in Tokyo |
| Tokyo (JST) | 10:00 PM (-1) in New York, 3:00 AM in London |
| Los Angeles (PST) | 8:00 PM in London, 5:00 AM (+1) in Tokyo |
Note: Times shown are for standard time (not DST)
Frequently Asked Questions
What is a time zone?
A time zone is a region that observes a uniform standard time. The world is divided into 24 major time zones, each roughly 15 degrees of longitude wide, with local variations for political or practical reasons.
Does this converter account for Daylight Saving Time?
Yes, our converter automatically accounts for Daylight Saving Time (DST) changes when applicable. The conversion uses your browser's built-in timezone database which includes DST rules for each region.
What is UTC?
UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks and time. It is the successor to GMT and serves as the reference point from which all time zones are calculated.
Why does the date sometimes change when converting?
When there is a significant time difference between zones, converting a time near midnight can result in a different calendar date. For example, 11 PM in New York is 4 AM the next day in London.
How do I schedule a meeting across time zones?
Enter your preferred meeting time in your local time zone, then check what time it would be for each participant. Look for times that fall within reasonable business hours (typically 9 AM - 6 PM) for all participants.
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Dr. Snezana Lawrence
Mathematical Historian | PhD from Yale
Dr. Lawrence is a published mathematical historian with a PhD from Yale University. She ensures mathematical precision and accuracy in all our calculations, conversions, and academic score calculators. Her expertise spans computational mathematics and educational assessment.
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