About this tool
The time difference calculator shows exactly how many hours and minutes separate two cities right now, accounting for daylight saving time. It also shows the current local time in both cities so you can see at a glance who is ahead.
Frequently Asked Questions
How do I calculate the time difference between two cities?+
Select two cities and click Calculate. The tool shows the exact number of hours and minutes between them right now, accounting for daylight saving time, and displays the current local time in both cities.
Why does the time difference change throughout the year?+
Many countries observe daylight saving time, which shifts clocks forward by one hour in summer. When two cities are on different schedules — for example one is in summer and the other isn't — the time difference between them changes.
What is the time difference between London and New York?+
London and New York are typically 5 hours apart — New York is 5 hours behind London in winter (GMT vs EST). In summer this can change to 4 hours due to daylight saving time differences.
How many hours ahead is Sydney compared to London?+
Sydney is typically 10 or 11 hours ahead of London depending on the time of year. Australia observes daylight saving in the southern summer (October to April) while the UK observes it in the northern summer.
What is the maximum possible time difference between two places?+
The maximum time difference on Earth is 26 hours — between the Line Islands (UTC+14) and Baker Island (UTC-12). This means it is possible for two places on Earth to have a difference of more than a full day.