Oops, it doesn't look like 'defend your belief in obvious conspiracy day' is a national day..

Other days

slime

Slime Day
ruby

Ruby Day
self appreciation

Self Appreciation Day
stress awareness

Stress Awareness Day
healing

Healing Day
first love

First Love Day
believe

Believe Day
self care

Self Care Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
lumpy rug

Lumpy Rug Day