Compare Time Zones

A calculator for the comparison of two time zones and for the calculation of the time difference between them. Here is a simplified choice of different time zones. Choose two time zones to compare and enter a time for the first zone. If DST is checked, then to this time zone one hour is added for daylight saving time. The time of the second zone will be shown and the difference between both time zones will be calculated.

Time Zone	Time	DST
1. +12 New Zealand, Fiji+10 Eastern Australia, New Guinea+9:30 Central Australia+9 Japan, Korea+8 China, Singapore, Western Australia+7 Indonesia, Thailand, Vietnam+6 Bangladesh, Omsk+5:30 India+5 Pakistan, Maldives+4 Armenia, Mauritius, UAE+3:30 Iran+3 Arabia, Iraq, Moscow, Eastern Africa+2 Eastern Europe, Central Africa+1 Central Europe, Western Africa±0 Western Europe, Western Africa, UTC-3 Argentinia, Eastern Brazil, Chile-4 Atlantic, Western Brazil, Venezuela-5 East Coast, USA East, Eastern Canada-6 Central America, Central Mexiko-7 Rocky Mountains, Western Mexiko-8 Pacific, West Coast USA, Canada-9 Alaska-10 Hawaii	01234567891011121314151617181920212223:000102030405060708091011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859
2. +12 New Zealand, Fiji+10 Eastern Australia, New Guinea+9:30 Central Australia+9 Japan, Korea+8 China, Singapore, Western Australia+7 Indonesia, Thailand, Vietnam+6 Bangladesh, Omsk+5:30 India+5 Pakistan, Maldives+4 Armenia, Mauritius, UAE+3:30 Iran+3 Arabia, Iraq, Moscow, Eastern Africa+2 Eastern Europe, Central Africa+1 Central Europe, Western Africa±0 Western Europe, Western Africa, UTC-3 Argentinia, Eastern Brazil, Chile-4 Atlantic, Western Brazil, Venezuela-5 East Coast, USA East, Eastern Canada-6 Central America, Central Mexiko-7 Rocky Mountains, Western Mexiko-8 Pacific, West Coast USA, Canada-9 Alaska-10 Hawaii	11 : 00

In the first time zone, it is 1 h later than in the second time zone.

Example: When it's 17:00 (5:00 PM) in Germany (Central European Time), it is 8:00 AM on the US West Coast, for example, in California. The difference is nine hours. This applies when both regions are on standard time and also when both are observing daylight saving time.

Daylight saving time changes are not synchronized between countries, even those on the same hemisphere and at similar latitudes. Therefore, it is possible for one country to be on standard time while another observes daylight saving time. In the example above with Germany and California, daylight saving time is in effect in Germany from the end of March to the end of October, and in California from the beginning of March to the beginning of November. This is the situation as of 2026. These differences in the timing of the time change of course create potential for errors.

A country's or time zone's standard time is usually chosen so that the sun reaches its highest point there at noon. Since countries are geographically dispersed, this cannot apply to the entire country. However, it should be true for all regions of the country or the respective time zone in that true noon is closer to 12:00 than to any other full hour. This is at least theoretical, in practice, natural boundaries, cultural divides, geographical features, and other factors complicate matters. Daylight Saving Time, on the other hand, places the ideal noon at 13:00 (1:00 p.m.)

Every country can choose its own time zones itself and change them at will. Therefore, the real number of different time zones is very high and confusing. Here is an overview of time zones in countries and areas.

Last updated on 03/27/2026. Author: Jürgen Kummer

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