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

Other days

boy friend

Boy Friend Day
offer

Offer Day
my little pony

My Little Pony Day
boba

Boba Day
cat girl

Cat Girl Day
bow tie

Bow Tie Day
china

China Day
buddy

Buddy Day
nail polish

Nail Polish Day
slime

Slime Day