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

Other days

singles

Singles Day
pampering

Pampering Day
unicorn

Unicorn Day
tulip

Tulip Day
ponytail

Ponytail Day
self care

Self Care Day
lumpy rug

Lumpy Rug Day
tell a fairytale

Tell A Fairytale Day
latina equal pay

Latina Equal Pay Day
coffee

Coffee Day