Oops, it doesn't look like 'stay at home all day' is a national day..

Other days

slime

Slime Day
bonang

Bonang Day
nail polish

Nail Polish Day
ponytail

Ponytail Day
offer

Offer Day
first love

First Love Day
eat what you want

Eat What You Want Day
gum

Gum Day
cursing

Cursing Day
healing

Healing Day