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

Other days

African Immigrant And Refugee Hiv And Hep Awareness Day

Fiancee Day

Nae Nae Day

Tell Ur Crush You Like Them Day

Appreciate Yaself A Lil Extra Day

Emoji Day

Lumpy Rug Day

Offer Day

Pumpkin Day

Pick Me Day