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

Other days

gum

Gum Day
stress awareness

Stress Awareness Day
bubble bath

Bubble Bath Day
promposal

Promposal Day
boyfriend

Boyfriend Day
aloxolt

Aloxolt Day
kale

Kale Day
unicorn

Unicorn Day
blanket fort

Blanket Fort Day
boy friend

Boy Friend Day