What is si unit of time?

The SI unit of time is the second (s)

Explanation:

The SI unit system (in French Système Internationale d'Unités) is a global system of units used in order to guarantee an equal system of measurements around the world. The SI unit for time is the Second (s). Other SI units include: the kelvin (K) for temperature, the meter (m) for lenght, the kilogram (kg) for mass, the ampere (A) for current, and the mole (mol) for quantity.

The SI unit of time is, " second."