News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Daniel Cousineau's Blog:
Calculating Daylight Savings Time Boundary In PHP
March 11, 2009 @ 12:02:15

Daniel 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 (when it starts and when it ends).

I had an issue recently where I needed to calculate the Unix timestamp for the daylight savings time boundaries. According to the United States Naval Observatory, daylight savings time begins the Second Sunday of March and ends on the First Sunday of November.

He looks at using the strtotime function to calculate these dates but points out some quirks - like what happens when you just give it a month or something like "second Sunday". His solution was to go back one day ("March 0" instead of "March 1") and calculating the time from there, including that first full day of March in the calculation.

0 comments voice your opinion now!
calculate daylight savings time boundary march november strtotime


blog comments powered by Disqus

Similar Posts

Leon Chevalier's Blog: Improve website load time by 500% with 3 lines of code

3greeneggs.com: What do those PHP errors really mean, anyway?

Community News: Forum PHP 2006 (Paris) Announced

php|architect: March 2006 Issue Released

James Cohen's Blog: Working with Date and Time in PHP


Community Events





Don't see your event here?
Let us know!


interview symfony opinion install zendserver community library api unittest series release framework language update laravel package podcast tips introduction deployment

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework