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

Other days

ask out your crush

Ask Out Your Crush Day
buddy

Buddy Day
promposal

Promposal Day
fiancee

Fiancee Day
carpenters

Carpenters Day
unicorn

Unicorn Day
ruby

Ruby Day
prosecco

Prosecco Day
kiss a brunette

Kiss A Brunette Day
tell a fairytale

Tell A Fairytale Day