Also from Thoreau:

As a man grows older, his ability to sit still and
follow indoor occupations increases. He grows vespertinal in his habits as the evening
of life approaches, till at last he comes forth only
just before sundown, and gets all the walk that he
requires in half an hour.

Goddam software won't let me put linewrap where I want it.

vespertinal ~ analogous to "matutinal" ? Never see much of either one these days.

Ah, but the the key is to develop a kinetic vespertinality, as you have, Good Doctor!