Add first and last months to CollecTor's Available Descriptors table
We're generating the directory listing pages linked from the CollecTor page by parsing CollecTor's
What we could also do is include first and last months in the Available Descriptors table. And for ongoing collections we could say something like "$month to present".
This isn't super important, as users can as well click through directory listings to obtain this information. But it's also not terribly hard to build. Setting priority to Low. Maybe something for a Friday afternoon.