Template:Datepage/doc

This template is used to designate articles that contain factoids for the On this day template. It displays the message in a box with a graphic, explaining that editors should not remove or change the format of the section labeled "On This Day". The template takes an unnamed argument that should be the zero-padded day of the year (from 001 to 366) which it uses to generate a category with the appropriate sort key. The category is Category:Calendar dates. You can override this feature by specifying a named category argument.

Usage
or