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

Other days

slime

Slime Day
stress awareness

Stress Awareness Day
self care

Self Care Day
offer

Offer Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
azonto is acceptable

Azonto Is Acceptable Day
ponytail

Ponytail Day
reading

Reading Day
ask out your crush

Ask Out Your Crush Day
brow

Brow Day