Time, Date & Timezone CalcyZone Calculator
Time Zone Difference Calculator
Calculate the hour and minute difference between any two cities or time zones.
🌐 Time Zone & Offset Calculator
Convert times globally with real-time flag location pickers, IANA DST accuracy, and hour diff analysis.
Popular:
Offset: UTC-4:00EST/EDT/ET
Offset: UTC+0:00GMT/BST
🌐
Converted Local Time Result+4 hrs
Thu, Oct 29, 2026, 04:00:00 PM
London is 4 hours ahead of New York
New YorkCountry:United States
Timezone IANA:America/New_York
Abbreviations:EST, EDT, ET
LondonCountry:United Kingdom
Timezone IANA:Europe/London
Abbreviations:GMT, BST
Mathematical Formula
Difference = Destination IANA Offset minus Source IANA Offset
Overview & Explanation
Calculates the exact net hour and minute difference between any two global cities or time zones with live Daylight Saving Time adjustment.
How It Works
- Evaluates current UTC offsets for both locations and subtracts them.
Practical Applications
- Comparing travel time gaps.
- Scheduling call windows.
- International meeting coordination.
Worked Example: New York vs Tokyo
Calculate time gap.
1
Calculate Gap
UTC-4 vs UTC+9
= Tokyo is 13 hours ahead of New York
Frequently Asked Questions
How do I calculate the time difference between two cities?
Enter both city names into the Time Zone Difference Calculator. It automatically queries the official IANA time database, factors in active daylight saving time, and computes the exact hour difference.
How many hours is Tokyo ahead of New York?
Tokyo is 13 hours ahead of New York during Daylight Saving Time (EDT) and 14 hours ahead during Standard Time (EST).
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