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

Other days

eat what you want

Eat What You Want Day
law

Law Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
coffee

Coffee Day
self care

Self Care Day
comfy

Comfy Day
gum

Gum Day
reading

Reading Day
china

China Day
boyfriend

Boyfriend Day