Time zone difference
See the time difference between two places today and throughout the year, including when daylight saving time changes the offset.
Processed on your device. Nothing you type is sent anywhere.
How to use: Time zone difference
- Choose two places (London and New York are selected by default).
- See the current time difference, then check each period over the next 12 months and the difference in effect.
- Enter a date to see the time difference on that day—useful when planning a trip.
About this tool
Why the time difference changes
The time difference between two places stays the same only when neither observes daylight saving time. When one or both places change their clocks, the difference can shift twice a year. The exact dates and amount depend on each location’s daylight saving rules.
- Southern Hemisphere: Chile, parts of Australia, and New Zealand move their clocks forward between September and April—the opposite season from Europe.
- Half-hour and quarter-hour offsets: India (UTC+5:30), Iran (UTC+3:30), Afghanistan (UTC+4:30), and Nepal (UTC+5:45) have non-hour time differences.
- Different change dates: The US and Europe change their clocks on different weekends, so the time difference between them can be unusual for a week or two.
Where the dates come from
Your browser calculates clock change dates using the IANA time zone database—the same database used by your phone—for the next 12 months. When a country changes its rules, the database is updated along with your browser or operating system.
To convert a specific time, use the time zone converter. The current time page shows the local time and time difference for 150 locations.
Frequently asked questions
What is the time difference between London and New York?
London is 5 hours ahead of New York from the last Sunday in October to the last Sunday in March. During the rest of the year, the difference is usually 4 hours. The exact dates can vary when daylight saving time starts or ends.
What is the time difference between the US and the UK?
It depends on the cities and the time of year. New York is usually 5 hours behind London, while Los Angeles is usually 8 hours behind. The gap can briefly change when daylight saving time starts or ends on different dates.
Does this account for daylight saving time?
Yes. The tool calculates the time difference using each location's official rules and lists the periods over the next 12 months when it changes.
Is it really free? Is there a daily limit?
It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.
Does it work on phones?
Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.
Related tools
Time Zone Converter
Convert a time from one city to another and find a meeting time that works for everyone.
World Clock
See the current time in multiple cities side by side, along with the time difference from your location. Add or remove cities—the list stays saved on your device.
Date Difference Calculator
Calculate the number of days, weeks, months, and years between two dates, or add days to a date.
Time Calculator
Add and subtract hours and minutes, find the time between two times (including across midnight), and calculate your time balance.
BMI Calculator
Calculate your body mass index and see the WHO classification and healthy weight range.
Rule of three (proportion) calculator
Solve simple and compound proportions, including direct and inverse proportions, with the formula.
Compound Interest Calculator
Estimate investment growth with monthly contributions, a monthly or annual rate, and a month-by-month table you can download as a CSV.
Percentage Calculator
Find X% of Y, calculate increases, discounts, and percentage changes.