Changing timezones in a timestamp

By default PHP's date() function (and in turn, SimplePie's get_date() method) return the timestamp according to the web server's timezone. But what if your timezone and your server's are different and you want to display yours?

Use the date_default_timezone_set() function with a timezone parameter from the timezone page. This should be set before PHP's date() or SimplePie's get_date() is called.

date_default_timezone_set('America/Los_Angeles');

Use the putenv() function as documented in this comment.