Oops, it doesn't look like 'team came to an end day' is a national day..

Other days

lisp

Lisp Day
ruby

Ruby Day
stud

Stud Day
slime

Slime Day
lash

Lash Day
hannah

Hannah Day
comfy

Comfy Day
cuddle up

Cuddle Up Day
chocolate milkshake

Chocolate Milkshake Day
hot chocolate

Hot Chocolate Day