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

Other days

ruby

Ruby Day

lumpy rug

Lumpy Rug Day

pick me

Pick Me Day

bubble bath

Bubble Bath Day

tell a fairytale

Tell A Fairytale Day

first love

First Love Day

Emoji Day

fiancee

Fiancee Day

azonto is acceptable

Azonto Is Acceptable Day

book

Book Day