Returns the hour of a given time.
Syntax:
HOUR(time)
returns the hour of time as a number, 0 - 23. time may be text or a date-time serial number.
Example:
HOUR("2021-12-01 21:30:15")
returns 21.
HOUR(A1)
where cell A1 contains the time 9:25:10 as a date-time serial number, returns 9.