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Standard Time simplifies timekeeping by using a uniform clock time set within a region, usually aligning with a specific time zone. This means that everyone within the time zone follows the same set clock time, making scheduling more efficient.
Before Standard Time, each town maintained its own local time based on the sun's position, which led to confusion, particularly with increased travel and communication.
To address these inconsistencies, Sir Sandford Fleming proposed that the world be divided into time zones, each with a uniform time called Standard Time. This made it possible for trains to have reliable schedules, benefiting commerce and daily activities alike.

Greenwich Mean Time, or GMT, serves as the baseline for calculating time around the globe. Located at 0 degrees longitude in Greenwich, England, GMT was the international time standard used before the advent of Coordinated Universal Time (UTC).
GMT is the mean solar time at the Royal Observatory in Greenwich, a historical site still referenced today.
While UTC is now more commonly used, GMT remains a key reference point for time zones worldwide, often used interchangeably with UTC in casual contexts.

Longitude refers to the geographic coordinate measuring east-west positions on Earth. Imaginary lines, called meridians, run from the North Pole to the South Pole. These lines are used to define different time zones.
The Prime Meridian, set at 0 degrees longitude in Greenwich, England, is used to divide the world into the Eastern and Western Hemispheres.
Every 15 degrees of longitude typically represents an hour of time difference, with Earth's 360 degrees of longitude forming the basis for the 24-hour day.

• Longitude helps define the 24 standard time zones
• it ensures consistency in global timekeeping
• it aids navigation and geolocation.

Solar time is the method of keeping time based on the sun's position in the sky, reflecting the traditional understanding of time. Before the standardized system, local clocks were set according to solar noon, which is the point when the sun is at its highest in the sky.
However, solar time varies from one longitude to another, which complicated scheduling as communities spread over large distances.
With the introduction of time zones, standard time closely aligns with solar time. This ensures clocks across a region reflect the sun's general position, allowing people in each zone to experience midday around the solar noon, simplifying daily life and enhancing coordination across regions.