ActionScript 2.0 Language Reference - Adobe Help and Support

Example
The following example initially creates a new Date object, setting the time and date to
8:00:00 a.m. on May 15, 2004, and uses Date.setSeconds() to change the time to 8:00:45
a.m.:
var my_date:Date = new Date(2004,4,15,8,0,0);
trace(my_date.getSeconds()); // output: 0
my_date.setSeconds(45);
trace(my_date.getSeconds()); // output: 45
setTime (Date.setTime method)
public setTime(millisecond:Number) : Number
Sets the date for the specified Date object in milliseconds since midnight on January 1, 1970,
and returns the new time in milliseconds.
Availability: ActionScript 1.0; Flash Player 5
Parameters
millisecond:Number - A number; an integer value where 0 is midnight on January 1,
universal time.
Returns
Number - An integer.
Example
The following example initially creates a new Date object, setting the time and date to 8:00
a.m. on May 15, 2004, and uses Date.setTime() to change the time to 8:30 a.m.:
var my_date:Date = new Date(2004,4,15,8,0,0);
var myDate_num:Number = my_date.getTime(); // convert my_date to
milliseconds
myDate_num += 30 * 60 * 1000; // add 30 minutes in milliseconds
my_date.setTime(myDate_num); // set my_date Date object 30 minutes forward
trace(my_date.getFullYear()); // output: 2004
trace(my_date.getMonth()); // output: 4
trace(my_date.getDate()); // output: 15
trace(my_date.getHours()); // output: 8
trace(my_date.getMinutes()); // output: 30
Date 503