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

Other days

china

China Day
eat what you want

Eat What You Want Day
self care

Self Care Day
ormille

Ormille Day
blanket fort

Blanket Fort Day
comfy

Comfy Day
kale

Kale Day
tulip

Tulip Day
stud

Stud Day
hot chocolate

Hot Chocolate Day