date.subtractHours()
This method subtracts the number of hours from the date or time.
Parameters
Numeric value
Return Value
Date with number of hours subtracted
Example
pjs.define("time", { type: 'time', initValue: '12:00:00'});
time = time.subtractHours(1);
return time;
//11:00:00
RPG Equivalent
%HOURS()