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

Other days

pumpkin

Pumpkin Day
mean girls

Mean Girls Day
ask out your crush

Ask Out Your Crush Day
stress awareness

Stress Awareness Day
self care

Self Care Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
kale

Kale Day
believe

Believe Day
lost sock memorial

Lost Sock Memorial Day
china

China Day