Oops, it doesn't look like 'harry styles ended trump day' is a national day..

Other days

bonang

Bonang Day
one

One Day
buddy

Buddy Day
slime

Slime Day
coffee

Coffee Day
eat what you want

Eat What You Want Day
hoodie

Hoodie Day
boyfriend

Boyfriend Day
nae nae

Nae Nae Day
cursing

Cursing Day