Oops, it doesn't look like 'horny librarian appreciation day' is a national day..

Other days

boba

Boba Day
lisp

Lisp Day
unicorn

Unicorn Day
hannah

Hannah Day
slime

Slime Day
fiancee

Fiancee Day
bow tie

Bow Tie Day
youth

Youth Day
tulip

Tulip Day
self care

Self Care Day