Oops, it doesn't look like 'return stuff to the store day' is a national day..

Other days

chocolate milkshake

Chocolate Milkshake Day

cuddle up

Cuddle Up Day

ponytail

Ponytail Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

Emoji Day

bow tie

Bow Tie Day

azonto is acceptable

Azonto Is Acceptable Day

brow

Brow Day

hiv awareness

Hiv Awareness Day

cursing

Cursing Day