Oops, it doesn't look like 'in the same day' is a national day..

Other days

hoodie

Hoodie Day
me

Me Day
blanket fort

Blanket Fort Day
hiv awareness

Hiv Awareness Day
tulip

Tulip Day
boy friend

Boy Friend Day
nae nae

Nae Nae Day
coffee

Coffee Day
bubble bath

Bubble Bath Day
healing

Healing Day