Oops, it doesn't look like 'league after match day' is a national day..

Other days

gum

Gum Day
ruby

Ruby Day
ride the wind

Ride The Wind Day
self care

Self Care Day
lumpy rug

Lumpy Rug Day
blanket fort

Blanket Fort Day
coffee

Coffee Day
boba

Boba Day
pumpkin

Pumpkin Day
polyamory

Polyamory Day