execute : time
 
time
Get or set the system time.
Syntax
execute time [<time_str>]
time_str has the form hh:mm:ss, where
hh is the hour and can be 00 to 23
mm is the minutes and can be 00 to 59
ss is the seconds and can be 00 to 59
If you do not specify a time, the command returns the current system time.
You are allowed to shorten numbers to only one digit when setting the time. For example both 01:01:01 and 1:1:1 are allowed.
Example
This example sets the system time to 15:31:03:
execute time 15:31:03