Oops, it doesn't look like 'And Aintree Ladies day' is a national day..

Other days

promposal

Promposal Day
artists

Artists Day
book

Book Day
bow tie

Bow Tie Day
youth

Youth Day
cuddle up

Cuddle Up Day
kiss a ginger

Kiss A Ginger Day
pick me

Pick Me Day
china

China Day
lash

Lash Day