Oops, it doesn't look like 'security council following the day' is a national day..

Other days

boba

Boba Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
one

One Day
me

Me Day
kiss a brunette

Kiss A Brunette Day
my little pony

My Little Pony Day
coffee

Coffee Day
bow tie

Bow Tie Day
prescription drug take back

Prescription Drug Take Back Day
fiancee

Fiancee Day