Oops, it doesn't look like 'school in kerry saw three sets of twins and a set of triplets arrive for their first day' is a national day..

Other days

Blanket Fort Day

Pick Me Day

Appreciate Yaself A Lil Extra Day

Tulip Day

Self Appreciation Day

My Little Pony Day

Latina Equal Pay Day

Eat What You Want Day

Fiancee Day

Lost Sock Memorial Day