Oops, it doesn't look like 'museums shut for second museums are shut for a second day' is a national day..

Other days

Frozen Yogurt Day

Azonto Is Acceptable Day

Raise Awerness Of Zeus Day

Appreciate Yaself A Lil Extra Day

Self Care Day

Cuddle Up Day

Kiss A Brunette Day

Latina Equal Pay Day

Ponytail Day

Mean Girls Day