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

Other days

frozen yogurt

Frozen Yogurt Day
stud

Stud Day
boba

Boba Day
first love

First Love Day
boy friend

Boy Friend Day
cat girl

Cat Girl Day
lash

Lash Day
youth

Youth Day
fiancee

Fiancee Day
self care

Self Care Day