I must have missed the discussion...
but please tell me I misunderstood that it has been suggested that
three-digit and two-digit things like
would mean 1900s and 1960s. If this was not a misunderstanding, or
a figment of the digest malformatting (the digest shows up to me as
rather battered HTML), please reconsider that. That would be a really
bad decision. The most obvious one being that how would one then
specify the year one hundread and ninety-six, for example? Not just
for ancient authors, but for specifying dates for any old events.
Rather, stick to specifying the uncertain parts with the "u", e.g.
I have written my share of date parsing and formatting software,
and I simply cannot even start to describe how utterly bad an idea
it would be to encode uncertainty by the absence of digits.