If you want to find the time in Berlin, for example, you'd type time:berlin. The space between the colon and the city name is optional, as is capitalization. Google will return the results at the top of the page before the regular Web search results.
But what if you meant Berlin, Wisconsin? No worries. Google returns the results of all the cities in its database with the name Berlin.
If you type in a country, city, or state that covers multiple time zones, Google will list all of the time zones. Time: usa will list the local times in Chicago, Denver, Phoenix, Los Angeles, Anchorage and Honolulu.