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

Other days

prosecco

Prosecco Day
nae nae

Nae Nae Day
pick me

Pick Me Day
coffee

Coffee Day
bow tie

Bow Tie Day
offer

Offer Day
nail polish

Nail Polish Day
bounce

Bounce Day
get funky

Get Funky Day
artists

Artists Day