Oops, it doesn't look like 'letter of intent of the day' is a national day..

Other days

tulip

Tulip Day
bounce

Bounce Day
self care

Self Care Day
unicorn

Unicorn Day
ruby

Ruby Day
lash

Lash Day
believe

Believe Day
martini

Martini Day
cursing

Cursing Day
lumpy rug

Lumpy Rug Day