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

Other days

gum

Gum Day
law

Law Day
nae nae

Nae Nae Day
pampering

Pampering Day
boba

Boba Day
martini

Martini Day
my little pony

My Little Pony Day
prosecco

Prosecco Day
china

China Day
tulip

Tulip Day