Oops, it doesn't look like 'style concert in nanjing day' is a national day..

Other days

nae nae

Nae Nae Day
gum

Gum Day
ormille

Ormille Day
healing

Healing Day
comfy

Comfy Day
bow tie

Bow Tie Day
slime

Slime Day
coffee

Coffee Day
eat what you want

Eat What You Want Day
believe

Believe Day