Oops, it doesn't look like 'office will be closed in observance of the day' is a national day..

Other days

slime

Slime Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
first love

First Love Day
pampering

Pampering Day
hannah

Hannah Day
latina equal pay

Latina Equal Pay Day
azonto is acceptable

Azonto Is Acceptable Day
prosecco

Prosecco Day
cuddle up

Cuddle Up Day
me

Me Day