Extension:When

The When extension adds the #when parser-function is used to add time information categories to articles. Just add a single parameter which can be arbitrarily formatted time information, for example:
 *  
 *  
 *   - current year is used here since not specified

The function expands to a set of category links to categorise the article into year, month, day-of-month, full-weekday-name and time (24 hour HH:MM:SS format). Articles exhibiting time can then be matched with a DPL query, for example:
 *  

The parser function which adds this is very simple consisting of the following code in the LocalSettings.php file.