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

Other days

eat what you want

Eat What You Want Day
kale

Kale Day
lash

Lash Day
self care

Self Care Day
fiancee

Fiancee Day
bow tie

Bow Tie Day
hannah

Hannah Day
offer

Offer Day
self appreciation

Self Appreciation Day
pick me

Pick Me Day