Oops, it doesn't look like 'missing cliff burton day' is a national day..

Other days

kale

Kale Day

tell ur crush you like them

Tell Ur Crush You Like Them Day

ask out your crush

Ask Out Your Crush Day

frozen yogurt

Frozen Yogurt Day

boba

Boba Day

self appreciation

Self Appreciation Day

Emoji Day

one

One Day

azonto is acceptable

Azonto Is Acceptable Day

boy friend

Boy Friend Day