About
Measurement of time is built on units, such as:
Unit of time are used to:
- define an instant. The more unit, the more precision
- define an amount of time (ie duration or period) when every unit has a quantity (2 year, …)
Second is the base unit of time in the International System of Units (SI), see Second
The units of time are also known as the datetime fields because they make up a date time value.