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

Other days

carpenters

Carpenters Day
self care

Self Care Day
hannah

Hannah Day
frozen yogurt

Frozen Yogurt Day
self appreciation

Self Appreciation Day
ruby

Ruby Day
martini

Martini Day
prosecco

Prosecco Day
cuddle up

Cuddle Up Day
believe

Believe Day