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

Other days

slime

Slime Day
self appreciation

Self Appreciation Day
tulip

Tulip Day
aloxolt

Aloxolt Day
ponytail

Ponytail Day
nae nae

Nae Nae Day
girl friend

Girl Friend Day
latina equal pay

Latina Equal Pay Day
china

China Day
bow tie

Bow Tie Day