Oops, it doesn't look like 'mps can lie and use christianity to cheat in parliament all on the saddest day' is a national day..

Other days

Lost Sock Memorial Day

One Day

Kiss A Brunette Day

Ask Out Your Crush Day

Gum Day

Unicorn Day

Fiancee Day

Bounce Day

Tell Ur Crush You Like Them Day

Donate Your Hair Day