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

Other days

ruby

Ruby Day
lisp

Lisp Day
youth

Youth Day
artists

Artists Day
nae nae

Nae Nae Day
blanket fort

Blanket Fort Day
carpenters

Carpenters Day
kiss a brunette

Kiss A Brunette Day
stud

Stud Day
unicorn

Unicorn Day