Comments on: Calculating Daylight Savings Time Boundary In PHP

By: haris

haris — Thu, 02 Sep 2010 05:50:05 +0000

nice post, it helped me a lot

By: Jesse

Jesse — Fri, 11 Sep 2009 12:50:39 +0000

Thanks for this script. The php docs just weren’t clear enough for me, plus Yahoo! hasn’t upgraded to php 5 yet, so this is an awesome hack around.

By: volomike

volomike — Sun, 26 Apr 2009 03:25:30 +0000

Does your code work for non-USA timezones like in the UK?

By: Daniel Cousineau’s Blog: Calculating Daylight Savings Time Boundary In PHP : Dragonfly Networks

Thu, 12 Mar 2009 04:52:25 +0000

[...] Cousineau has written up some timely advice in a new post to his blog. It looks at pinpointing the time boundary for Daylight Savings Time in a PHP script [...]

By: Daniel Cousineau

Daniel Cousineau — Tue, 10 Mar 2009 17:14:50 +0000

The system I was working on was importing the timestamps and the DST information wasn’t being applied correctly.

My solution may be a temporary hack but it was a fun exercise playing with strtotime() and realizing how good I have it with PHP’s date functions.

By: Giorgio Sironi

Giorgio Sironi — Tue, 10 Mar 2009 17:06:45 +0000

Well, what is the purpose of having those boundaries as timestamps? If you set the timezone, php date functions will calculate the hour shift accordingly. However,
date(‘I’, $time)
will tell you if dst is on at that time.