Why were stardardized time zones used in the US?

Answer 1

coz it was okay !!!!

Standard time zones in the United States are currently defined at the federal level by law 15 U.S.C. §260. The federal law also establishes the transition dates and times at which daylight saving time occurs, if observed. It is ultimately the authority of the Secretary of Transportation, in coordination with the states, to determine which regions will observe which of the standard time zones and if they will observe daylight saving time. As of August 9, 2007, the standard time zones are defined in terms of hourly offsets from UTC.[1] Prior to this they were based upon the mean solar time at several meridians 15° apart west of Greenwich (GMT).

Only the full time zone names listed below are official; abbreviations are by common use conventions.

The United States uses nine standard time zones. From east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC−11) and Chamorro Standard Time (UTC+10). View the standard time zone boundaries.

Answer 2

Standardized time zones were used in the US to improve coordination and efficiency in industries such as transportation and communication. Prior to the implementation of time zones, each city and town used its own local time. This proved problematic with the expansion of railroads and telegraphs, as schedules and communications became increasingly difficult to manage. Standardized time zones helped to synchronize operations across the country.