Oops, it doesn't look like 'finalist and a treasure on their big day' is a national day..

Other days

frozen yogurt

Frozen Yogurt Day

self care

Self Care Day

boyfriend

Boyfriend Day

lisp

Lisp Day

ask out your crush

Ask Out Your Crush Day

coffee

Coffee Day

eat what you want

Eat What You Want Day

Me Day

donate your hair

Donate Your Hair Day

nae nae

Nae Nae Day