The Collaborative International Dictionary
Hesternal
Hestern \Hes"tern\, Hesternal \Hes*ter"nal\, a. [L. hesternus;
akin to heri yesterday.]
Pertaining to yesterday. [Obs.] See Yester, a.
--Ld.
Lytton.
Wiktionary
hesternal
a. (context rare English) Of or pertaining to (l en yesterday).