PHP dates for use in WordPress.
Though this isn’t directly related to CSS, it is a styling issue of sorts. I found while messing around with the WordPress templates that I wanted to change the date formats from something like [February 18, 2008] to something like [18 Feb 2008]. WordPress uses PHP, so it’s just a matter of checking the online PHP manual for which letters will create which date format (easy enough to find on your own, but now we have a direct link). See also this WordPress documentation page for how to use the characters in WordPress.