Oops, it doesn't look like 'give up the rights to shadowhunters day' is a national day..

Other days

kiss a brunette

Kiss A Brunette Day
chocolate milkshake

Chocolate Milkshake Day
frozen yogurt

Frozen Yogurt Day
azonto is acceptable

Azonto Is Acceptable Day
kiss a ginger

Kiss A Ginger Day
coffee

Coffee Day
raise awerness of zeus

Raise Awerness Of Zeus Day
self appreciation

Self Appreciation Day
mean girls

Mean Girls Day
latina equal pay

Latina Equal Pay Day