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

Other days

ride the wind

Ride The Wind Day
bow tie

Bow Tie Day
bonang

Bonang Day
hoodie

Hoodie Day
brow

Brow Day
lumpy rug

Lumpy Rug Day
gum

Gum Day
my little pony

My Little Pony Day
promposal

Promposal Day
stress awareness

Stress Awareness Day