In the mid-1800s, Time zones originated with the advent of railways and telegraphs, enabling quick and efficient communication over vast distances.
Before this, each town & city had its own local time, which made coordinating train timetables & telegraph communications across a country difficult.
Sir Sandford Fleming, a Canadian engineer, proposed a system of 24 time zones, each 15 degrees of longitude broad, in 1878.
In 1884, Fleming suggested the International Meridian Conference about his proposal, and the first time zones were established in North America.
Early 1900s, most countries had adopted time zones, except for China and Nepal as their own time zones offset from Coordinated Universal Time (UTC).
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