Oops, it doesn't look like 'weed drug test drug test result drug dog day' is a national day..

Other days

buddy

Buddy Day

first love

First Love Day

lumpy rug

Lumpy Rug Day

my little pony

My Little Pony Day

reading

Reading Day

bow tie

Bow Tie Day

Me Day

singles

Singles Day

boba

Boba Day

lash

Lash Day