execute : date
 
date
Get or set the system date.
Syntax
execute date [<date_str>]
date_str has the form yyyy-mm-dd, where
yyyy is the year and can be 2001 to 2037
mm is the month and can be 01 to 12
dd is the day of the month and can be 01 to 31
If you do not specify a date, the command returns the current system date. Shortened values, such as ‘06’ instead of ‘2006’ for the year or ‘1’ instead of ‘01’ for month or day, are not valid.
Example
This example sets the date to 17 September 2004:
execute date 2004-09-17