Different Types of Time Systems
Universal Time (UT)
UT is a time standard based on the rotation of the Earth. It is the foundation for other timekeeping systems, such as Coordinated Universal Time (UTC).
Solar time is a way of measuring time-based on the sun’s position. The apparent solar time is determined by observing the sun’s position relative to a fixed location on Earth. In contrast, the mean solar time is determined by averaging the evident solar time over a year.
This is the timekeeping system used for everyday purposes, such as scheduling and coordinating regional activities. It is primarily synchronised with Coordinated Universal Time and is based on local time zones (UTC).