Oops, it doesn't look like 'mourning after huge attack day' is a national day..

Other days

prosecco

Prosecco Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
china

China Day
me

Me Day
special education

Special Education Day
boyfriend

Boyfriend Day
hot chocolate

Hot Chocolate Day
stress awareness

Stress Awareness Day
healing

Healing Day