Time Difference Calculator Between Two Cities

Why the date matters

The time difference between two cities is not always fixed. When one observes daylight saving and the other does not, the gap changes by an hour for part of the year. Riyadh is three hours ahead of London in winter but only two in summer, because the UK moves its clocks forward while Saudi time stays the same.

So the calculator works out the difference on the exact date you choose and shows each city’s UTC offset on that day.

Planning a call or meeting

1. 1Choose your city first and the other city second.
2. 2Enter the proposed date and time in your city, or press “Now”.
3. 3Read the matching time in the other city and look out for “next day” or “previous day”.
4. 4Check the conversion table: highlighted rows are hours that fall between 8 am and 5 pm in both cities.

Common differences from Saudi Arabia

These are illustrations and can change when countries change their rules; the calculator always uses the actual offset for your chosen date. To see several cities at once, open the world clock.

When does daylight saving start and end?

Across most of Europe clocks go forward one hour on the last Sunday in March and back on the last Sunday in October. In the United States and Canada daylight saving runs from the second Sunday in March to the first Sunday in November, so for a few weeks each spring and autumn the gaps between Riyadh, New York and London shift.

The Gulf states do not use daylight saving, while Egypt, Lebanon and Palestine do on dates set by their governments, and Morocco changes its clocks during Ramadan. That is why it is best to enter the date when working out the difference for a future appointment.