Template:Birth decade category header/doc

Usage
To add this template to, for example, Category:1910s births, use the following wikitext:

The parameters are:
 * 1) All the digits of the decade except the last 2
 * 2) The next-to-last digit of the decade
 * 3) The century the decade is in, as an ordinal number (e.g., 1st, 2nd, 3rd, 19th, etc.)