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

Other days

lumpy rug

Lumpy Rug Day
bonang

Bonang Day
polyamory

Polyamory Day
slime

Slime Day
chocolate milkshake

Chocolate Milkshake Day
comfy

Comfy Day
bow tie

Bow Tie Day
aloxolt

Aloxolt Day
brow

Brow Day
kiss a ginger

Kiss A Ginger Day