ActionScript for Flash MX: The Definitive Guide, Second Edition

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Example

The following code shows how to measure the milliseconds elapsed between midnight,

January 1, 1970 and midnight, January 1, 2000 in UTC time:

trace(Date.UTC(2000, 0) + " milliseconds passed between 1970 and 2000.");

// Displays: "946684800000 milliseconds passed between 1970 and 2000."

Here we use those elapsed milliseconds to construct a UTC-time-based Date object:

nowUTC = new Date(Date.UTC(2000, 0));

If we invoke that code in EST (Eastern Standard Time), which is 5 hours behind UTC,

nowUTC represents the local time, 7 P.M. on December 31, 1999. When we check the hour

using the non-UTC method getHours(), we get the local hour, 19 (7 P.M. in a 24-hour

clock):

trace(nowUTC.getHours()); // Displays: 19

But when we check the hour using the UTC method getUTCHours(), we get the correct

UTC hour, (midnight in a 24-hour clock):

trace(nowUTC.getUTCHours()); // Displays: 0

See Also

Date(), Date.setTime(), the Date class

Date.valueOf() Method

the number of milliseconds between January 1, 1970 and the time of the Date object

Flash 5

date.valueOf()

Returns

An integer expressing the number of milliseconds between the time of the Date object and

midnight, January 1, 1970—positive if after January 1, 1970; negative if before.

Description

In practice, ...