Oops, it doesn't look like 'donald dump day' is a national day..

Other days

promposal

Promposal Day
book

Book Day
youth

Youth Day
law

Law Day
nail polish

Nail Polish Day
eat what you want

Eat What You Want Day
prosecco

Prosecco Day
bow tie

Bow Tie Day
donate your hair

Donate Your Hair Day
ruby

Ruby Day