Template:Year/doc

This template normally looks blank, check below to confirm it works on a page

Usage
1998 1999 1999 1999 1999 1990 1990 2239

Reports "Error" without a reason if given bad input:

1990 1990 Reason for the error: there are not 14 months. Reason for the error: no month has 61 days. Reason for the error: there is no such month name. Reason for the error: no date information to parse.

If used with a year range, it returns only the first match:

This presently only works when the year range is specified with a hyphen; if correctly given with an en dash &emdash; which looks very similar, it reports an error (this will probably not be fixed, because handling ranges is not the template's function; that it kinda-sorta works on something like  with a hyphen is basically just an accident):

It can be cleanly substituted for this purpose. If fed invalid data when substituted, it produces a larger, red error.