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Time Zones in the USA and Daylight Saving Time
Olya Bezvushko

There are nine standard time zones in the USA. From east to west they are Atlantic Standard Time (AST), Pacific Standard Time (PST), Eastern Standard Time (EST), Central Standard Time (CST), Eastern Standard Time (EST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Samoa standard time (UTC-11), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10).

The main purpose of Daylight Saving Time (which is called "Summer Time" in many parts of the world) is to make better use of daylight. The change of clocks during the summer months moves an hour of daylight from the morning to the evening.

So, Daylight Saving Time gives the opportunity to enjoy sunny summer evenings by moving our clocks an hour forward in the spring. Yet, the implementation of Daylight Saving Time has been fraught with controversy since Benjamin Franklin conceived of the idea. Even today, regions and countries routinely change their approaches to Daylight Saving Time.

Most of the United States begins Daylight Saving Time at 2:00 a.m. on the second Sunday in March and reverts to standard time on the first Sunday in November. In the U.S., each time zone switches at a different time.

Just for you to know, in the European Union, Summer Time begins and ends at 1:00 a.m. Universal Time (Greenwich Mean Time). It starts the last Sunday in March and ends the last Sunday in October. In the EU, all time zones change at the same moment.