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

Other days

bonang

Bonang Day
chocolate milkshake

Chocolate Milkshake Day
polyamory

Polyamory Day
nail polish

Nail Polish Day
self appreciation

Self Appreciation Day
bow tie

Bow Tie Day
comfy

Comfy Day
carpenters

Carpenters Day
hannah

Hannah Day
ask out your crush

Ask Out Your Crush Day