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

Derick Rethans' Blog: Calculating start and end dates of a week

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

PHP Security Blog: Month of PHP Bugs and PHP 5.2.1

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

Community News: PHP Community Conference 2013 Announced!


Community Events





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


package library version update install security voicesoftheelephpant opinion release symfony community series tool framework podcast introduction interview language laravel composer

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