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

Other days

lumpy rug

Lumpy Rug Day
aloxolt

Aloxolt Day
self care

Self Care Day
ruby

Ruby Day
coffee

Coffee Day
bow tie

Bow Tie Day
youth

Youth Day
tulip

Tulip Day
kiss a brunette

Kiss A Brunette Day
china

China Day