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

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

unicorn

Unicorn Day

embarrass your best friend

Embarrass Your Best Friend Day

hiv awareness

Hiv Awareness Day

offer

Offer Day

fiancee

Fiancee Day

one

One Day

Emoji Day

promposal

Promposal Day

kale

Kale Day