Oops, it doesn't look like 'guard and celebrate the day' is a national day..

Other days

ruby

Ruby Day
kiss a ginger

Kiss A Ginger Day
kale

Kale Day
artists

Artists Day
lost sock memorial

Lost Sock Memorial Day
bow tie

Bow Tie Day
one

One Day
ormille

Ormille Day
bounce

Bounce Day
gum

Gum Day