Template:DateSort/doc

— like its sister templates, and  — allows for apparently automatic sorting of pages. It uses the magic word, DEFAULTSORT, along with a #switch, to convert a day of the year to a number from 1 to 365 (29 February sharing the same number as 28 February), thus allowing day of the year pages to sort numerically.

Usage
Usage is super easy. Just type DateSort at the bottom of a page. Then, when you add categories to the page you no longer have to define the sort key for every individual category. It will automatically sort the person by their numerical ID.