Idea: Promote writing articles for encyclopaedically notable people born on the day.
Necessary preparation:
Create and regularly maintain templates for all 366 days in the year, following the "MM-DD" convention for easy sorting and navigation. In each template add red links to unwritten bio-articles with very short explanation / teaser giving the nationality, occupation and the argument of notability of each person. Articles that already exist in different languages can be linked.
Maintain monthly archive of what has and has not been written in the current month. Follow the YYYY-MM convention. Here is the aggregated view bg:Уикипедия:Рожденици/Архив. This helps for creating statistics
Used for: Generating on demand category tree intersections of a category with/without another category, with/without templates, namespaces, various parameters related to byte size, time of last edit, links, red links, redirects, etc.
Used for: Helping other/smaller Wikipedias make good use of those collections based on the already existing usage of those images on Wikipedia in another language.
Browse the map and place the location marker using [Ctrl+click] or [Alt+click]
Specify the type of the object from a dropdown menu
Any change in the parameters immediately leads to change in the automatically filled in "Basic wikipedia/commons templates:": Coord (@ English Wikipedia), Location (@ Commons), Object location (@ Commons)
Click on coordinate markup in preferred format to copy it to clipboard.