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

Other days

polyamory

Polyamory Day
artists

Artists Day
bonang

Bonang Day
tell a fairytale

Tell A Fairytale Day
cuddle up

Cuddle Up Day
gum

Gum Day
gallery

Gallery Day
coffee

Coffee Day
ruby

Ruby Day
lost sock memorial

Lost Sock Memorial Day