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

Other days

tulip

Tulip Day
boba

Boba Day
boyfriend

Boyfriend Day
frozen yogurt

Frozen Yogurt Day
donate your hair

Donate Your Hair Day
kiss a ginger

Kiss A Ginger Day
china

China Day
book

Book Day
gum

Gum Day
stud

Stud Day