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

Other days

pick me

Pick Me Day
carpenters

Carpenters Day
hannah

Hannah Day
nae nae

Nae Nae Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
self appreciation

Self Appreciation Day
hoodie

Hoodie Day
fiancee

Fiancee Day
gum

Gum Day