The railroads.
When railroading started, time was based on the position of the sun: when it is directly overhead, it's "noon." Or, on a clock, 12:00. The problem with that is, what is "noon" in Chicago is not noon in Detroit or Milwaukee. This makes it hard to calculate timetables--if it takes an hour to go from Alphaville to Bravoville, you then have to work in a time correction factor. Worse: if a train leaves Alphaville going to Bravoville at noon, and a train leaves Bravoville going to Alphaville at noon, they're going to reach their destinations at different times.
So, they came up with a "standard time" deal. They divided the nation into four sections, because it takes four hours for the sun to pass across the US. Then they decided noon would be when the sun got to the middle of each section. Now, if a train leaves Bravoville for Alphaville at noon and one leaves Alphaville for Bravoville at noon, they'll both reach their destinations at the same time.
The railroads.
When railroading started, time was based on the position of the sun: when it is directly overhead, it's "noon." Or, on a clock, 12:00. The problem with that is, what is "noon" in Chicago is not noon in Detroit or Milwaukee. This makes it hard to calculate timetables--if it takes an hour to go from Alphaville to Bravoville, you then have to work in a time correction factor. Worse: if a train leaves Alphaville going to Bravoville at noon, and a train leaves Bravoville going to Alphaville at noon, they're going to reach their destinations at different times.
So, they came up with a "standard time" deal. They divided the nation into four sections, because it takes four hours for the sun to pass across the US. Then they decided noon would be when the sun got to the middle of each section. Now, if a train leaves Bravoville for Alphaville at noon and one leaves Alphaville for Bravoville at noon, they'll both reach their destinations at the same time.
The first sewerage system in Rome was made sometime in the 6th century BC during the reign of Terquinius Priscus. However the exact date is unknown. It is known as the Cloaca Maxima, or the "Great Sewer". It started out as a open canal going through the forum and remained that way until sometime in the 2nd century BC when it was finally covered over and became a sewer as we think of sewers today.
Although these two phrases are similar, they key difference is the use of "been". The "has started" statement suggests that the action or event has just recently happened whereas "has been started" creates a time lapse that a significant amount of time as passed.
linear history starts at the big bang when time started. time started when the first piece of matter moved because time is the measure of motion. As to when it ends, there is no way a person could know that so why would you ask that.
Since time immemorial. It still exists today.
Because they are successful every time
Sandford Fleming of Canada proposed a world-wide standard of time measurement in 1897, and by 1900 all countries adopted the system, which is used today.
today and it's already started
A second
Pacific Standard time. Today is October 25, 2010 at 11:35 am.
kanishka
Central Pacific Answer: The time zones were actually started with the railroads. The railroads had to be on time and before the universal time zones were initiated, many towns and states, ETC had their own time and railroads had a big problem trying to keep accurate time. The railroads came up with the idea of having 4 time zones for the united states.
Operating system
standard time
IRQ 1
Before the 1880s, every city had its own time. As transportation and communication started getting faster, that started getting more and more confusing.
Today at 19:30 Indian standard time.
Shi huangdi was the first emperor of china. He united china china for the first time. He built roads and canals and started to the great wall of china. He also made a standard system of laws, money, weights, and writing system in china.