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

Other days

boy friend

Boy Friend Day
cuddle up

Cuddle Up Day
ruby

Ruby Day
pampering

Pampering Day
believe

Believe Day
coffee

Coffee Day
donate your hair

Donate Your Hair Day
gum

Gum Day
hannah

Hannah Day
china

China Day