{{DateSort}} — like its sister templates, {{NameSort}} and {{TitleSort}} — 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.