Oops, it doesn't look like 'championships finals day' is a national day..

Other days

unicorn

Unicorn Day
tulip

Tulip Day
self care

Self Care Day
nae nae

Nae Nae Day
ruby

Ruby Day
promposal

Promposal Day
boy friend

Boy Friend Day
youth

Youth Day
fiancee

Fiancee Day
offer

Offer Day