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

Other days

bow tie

Bow Tie Day
blanket fort

Blanket Fort Day
healing

Healing Day
artists

Artists Day
carpenters

Carpenters Day
bubble bath

Bubble Bath Day
lumpy rug

Lumpy Rug Day
martini

Martini Day
hot chocolate

Hot Chocolate Day
ruby

Ruby Day