The borders on a world clock map which represents the time zones around the world are drawn to match up with the local and international time zone borders. As a result of the different time zones, there are 39 different local times that are currently being used worldwide which you can view on our time zone map. Time zones are named taking various factors into consideration, the most common one being location. Thankfully, time zones help to prevent the chaos that would reign if we were unable to readily determine the time in another locality.
Different time zones utilize daylight saving time at different times. In the United States, daylight saving time begins at 2:00 a.m. on the second Sunday in March and ends on the first Sunday in November. Each time zone in the U.S. switches at a different time. In the European Union, on the other hand, daylight saving time starts and ends at 1:00 a.m. Universal Time (Greenwich Mean Time). All EU time zones change at the same moment starting the last Sunday in March and ending the last Sunday in October. In the Southern Hemisphere, participating countries usually start the DST-period in September to November and end it in March to April.