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

Other days

boba

Boba Day
china

China Day
boy friend

Boy Friend Day
hiv awareness

Hiv Awareness Day
stress awareness

Stress Awareness Day
bow tie

Bow Tie Day
prescription drug take back

Prescription Drug Take Back Day
ruby

Ruby Day
frozen yogurt

Frozen Yogurt Day
my little pony

My Little Pony Day