Oops, it doesn't look like 'eat your vegetables eat your vegetables day' is a national day..

Other days

buddy

Buddy Day
self appreciation

Self Appreciation Day
unicorn

Unicorn Day
ask out your crush

Ask Out Your Crush Day
slime

Slime Day
bounce

Bounce Day
self care

Self Care Day
stress awareness

Stress Awareness Day
promposal

Promposal Day
hoodie

Hoodie Day