Oops, it doesn't look like 'sliding scale day' is a national day..

Other days

stud

Stud Day
healing

Healing Day
one

One Day
lumpy rug

Lumpy Rug Day
bow tie

Bow Tie Day
latina equal pay

Latina Equal Pay Day
buddy

Buddy Day
self care

Self Care Day
brow

Brow Day
aloxolt

Aloxolt Day