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

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
hannah

Hannah Day
self appreciation

Self Appreciation Day
pick me

Pick Me Day
unicorn

Unicorn Day
stress awareness

Stress Awareness Day
blanket fort

Blanket Fort Day
cuddle up

Cuddle Up Day
singles

Singles Day
healing

Healing Day