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

Other days

lisp

Lisp Day
boyfriend

Boyfriend Day
lash

Lash Day
boy friend

Boy Friend Day
self care

Self Care Day
bubble bath

Bubble Bath Day
stud

Stud Day
prescription drug take back

Prescription Drug Take Back Day
buddy

Buddy Day
youth

Youth Day