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

Other days

slime

Slime Day
bow tie

Bow Tie Day
hannah

Hannah Day
self appreciation

Self Appreciation Day
azonto is acceptable

Azonto Is Acceptable Day
cuddle up

Cuddle Up Day
pick me

Pick Me Day
latina equal pay

Latina Equal Pay Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
gallery

Gallery Day