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

Other days

lisp

Lisp Day
comfy

Comfy Day
self care

Self Care Day
boyfriend

Boyfriend Day
ride the wind

Ride The Wind Day
cat girl

Cat Girl Day
ruby

Ruby Day
lumpy rug

Lumpy Rug Day
hot chocolate

Hot Chocolate Day
bounce

Bounce Day