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

Other days

slime

Slime Day
coffee

Coffee Day
stress awareness

Stress Awareness Day
lumpy rug

Lumpy Rug Day
first love

First Love Day
ruby

Ruby Day
aloxolt

Aloxolt Day
fiancee

Fiancee Day
nae nae

Nae Nae Day
self care

Self Care Day