Don Butler is a fly shop employee and guide who can, if he wishes, be
on the water every day. There are hatches in the winter on the
Farmington that are fishable, so while difficult, given his situation,
the feat is far from impossible.

Did I ever do it? Hell no! Due to contraints like work, and my aversion
to fish in very cold temperastures, I've never come close to even
fishing 83 months in a row, much less catch fish on a dry each month.
Back in the early eighties, when we had a very warm winter, I did catch
fish every month of the year (1983 IIRC), but they were not all caught
on dries.