DST(daylight savings time) - time output

[slick101]

Hey everyone so I am messing around with timezones. Right now I get the users timezone with javascript. The problem is now DST.

Has anyone come across this issue. I setup my server to be by default GMT time.

Doing a few test now i do

 $date =  strtotime(date("Y:m:d H:i:s"));

I now have information on the user timezone in my case US EST time.
which is -5:00 (-18000)

which now I can do

 $date =  strtotime(date("Y:m:d H:i:s")) + -18000;echo date('M d, Y h:i A', $date);

Its not really the correct time it is 1hour behind. I also store if the timezone goes by daylght savings time. Which i now know if i need to deduct 1 from the hour so make it -4:00 60 60 gives me 14400. so now I get the correct time.

My issue is when do I know to apply that because not all months deal with it and all timezones are different with daylight savings =/ the agony.

[CoderDan]

php.net/strtotime states:

This function will use the TZ environment variable (if available) to calculate the timestamp. Since PHP 5.1.0 there are easier ways to define the timezone that is used across all date/time functions. That process is explained in the date_default_timezone_get() function page.