Oops, it doesn't look like 'turlte day' is a national day..

Other days

lisp

Lisp Day
kale

Kale Day
artists

Artists Day
lost sock memorial

Lost Sock Memorial Day
lumpy rug

Lumpy Rug Day
self care

Self Care Day
reading

Reading Day
fiancee

Fiancee Day
unicorn

Unicorn Day
self appreciation

Self Appreciation Day