The railroads.
They set it up even before it became law ... and helped pass the laws.
The reason was their requirement to schedule trains (this was before signals or even reliable telegraphs).
Everyone who uses time benefited from the use of standardized time and time zones, for one could save himself or herself the trouble by knowing when they should do what they have to do at a particular time mostly when crossing to different zones, for example they now got to know how long it could take them to reach some where and at what time they could get to that place counting in the time of the end point or zone, this made appointments much easier and planning better and timely increasing time management opportunity. For example not to get late when going some where for an important meeting some one had to do some math according to their destination time frame or standard time zone which was guess work before the standardization of time and time zones.
if you meant time zones there are 29, if you don't count poorly-wound clocks and daylight savings time
how many time zones from san francisco to cairns australia
there on a time line
In 1983, spring began on...20th March in northern hemisphere time zones west of and including UTC-5,21st March in northern hemisphere time zones east of and including UTC-4.5,23rd September in southern hemisphere time zones west of and including UTC+9, and24th September in southern hemisphere time zones east of and including UTC+9.5.
It benefited railroad companies and train travelers.
The farming industry in the US midwest, because the crops grow better in the daylight.
Standard Time Zones created by the railroad industry in the 1880's rather than solar time.
The railroads
Railroads, but notably the corruption within the transportation industry.
Everyone who uses time benefited from the use of standardized time and time zones, for one could save himself or herself the trouble by knowing when they should do what they have to do at a particular time mostly when crossing to different zones, for example they now got to know how long it could take them to reach some where and at what time they could get to that place counting in the time of the end point or zone, this made appointments much easier and planning better and timely increasing time management opportunity. For example not to get late when going some where for an important meeting some one had to do some math according to their destination time frame or standard time zone which was guess work before the standardization of time and time zones.
the cotton gin benefited cotton growers (but im not fully sure) :o)
The railway industry in Britain brought about the standardization of time from local mean time to Greenwich Mean Time. Afterward, the United States adopted standard time into law in 1918.
The system of worldwide time zones was first proposed In 1878 by the Canadian Sir Sanford Fleming. It was made for the convenience of trade & commerce, especially for the railway industry. There are 24 times zones which was based on the number of hours it takes the Earth to rotate on its axis.
Texas has 2 Time Zones: Mountain Time Texas: Daylight Saving Time: This time is 6 time zones to England Standard Time: This time is 7 time zones to England Central Time Texas: Daylight Saving Time: 5 Time Zones Standard Time: 6 Time Zones
Divided the United States into time zones
If you mean time zones. There is one. Russia has 7 time zones.