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

Other days

polyamory

Polyamory Day
self care

Self Care Day
latina equal pay

Latina Equal Pay Day
stress awareness

Stress Awareness Day
first love

First Love Day
buddy

Buddy Day
embarrass your best friend

Embarrass Your Best Friend Day
self appreciation

Self Appreciation Day
promposal

Promposal Day
blanket fort

Blanket Fort Day