Template:YYYY beginnings or endings category header/doc

This is a documentation subpage for Template:YYYY beginnings or endings category header.
It contains usage information, categories and other content that is not part of the original template page.

This template employs intricate features of template syntax.

You are encouraged to familiarise yourself with its setup and parser functions before editing the template. If your edit causes unexpected problems, please undo it quickly, as this template may appear on a large number of pages.
You can conduct experiments, and should test all major changes, in either , the general template sandbox, or your user space before changing anything here.

This template is used on approximately 4,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.

Transclusion count updated automatically (see documentation).

Creates a category of the form "YYYY beginnings" or "YYYY endings", where YYYY is a 2-, 3- or 4-digit year.

e.g.

The template detects whether the page is a "beginnings" or "endings" category, and configures the output accordingly.