Oops, it doesn't look like 'keep a secret to yourself day' is a national day..

Other days

brow

Brow Day
promposal

Promposal Day
self appreciation

Self Appreciation Day
self care

Self Care Day
believe

Believe Day
prosecco

Prosecco Day
get funky

Get Funky Day
azonto is acceptable

Azonto Is Acceptable Day
carpenters

Carpenters Day
bow tie

Bow Tie Day