Dates: Use YYYY-MM-DD or DATE(), don't assume an epoch or locale

Just a reminder - when creating test cases, if you need a date,
please always use YYYY-MM-DD as a text format or the DATE()
function; both are locale and epoch neutral.

Please don't use formats like "01/02/2005", because that could mean
EITHER January 2 or February 1, depending on the locale.
And obviously don't use particular sequence numbers (!).

--- David A. Wheeler