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

Ibuildings techPortal: Tips for PHP Date and Time Functions

Community News: Forum PHP 2006 (Paris) Announced

Daniel Cousineau's Blog: Calculating Daylight Savings Time Boundary In PHP

Derick Rethans\' Blog: php|tek conference

Justin Silverton\'s Blog: What would you like to see in PHP 6?


Community Events





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


threedevsandamaybe introduction configure library wordpress developer list community laravel language framework api release application interview project bugfix series podcast code

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