Parameters are case sensitive and take a set of date ranges (see below).
The template can take a case-sensitive named parameter for each game that is supported. Each parameter consists of a set of date ranges during which the person in question was a member of the NPO branch in that game. You can omit the end date if the person is currently a member.
The code attempts to recognize a variety of ways to input the date ranges, but it also depends on the #time parser function. In particular, it doesn't recognize dd/mm/yy format. For clarity, it's better to spell out dates or use yyyy-mm-dd. The preferred separator between ranges is a semicolon. Whatever the formatting, be consistent, but don't use the same character to separate both ranges and the dates within them.
The Ages/Eras icons are displayed using the indicators system. Notably, each Age/Era will have a unique identifier that determines its order on the page, which also prevents duplicates from being shown. These identifiers are determined in the module's
The above documentation is transcluded from Template:AgesEras/doc.