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

Other days

me

Me Day
ride the wind

Ride The Wind Day
self appreciation

Self Appreciation Day
law

Law Day
cuddle up

Cuddle Up Day
nae nae

Nae Nae Day
ormille

Ormille Day
eat what you want

Eat What You Want Day
pick me

Pick Me Day
martini

Martini Day