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

Other days

unicorn

Unicorn Day
martini

Martini Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
chocolate milkshake

Chocolate Milkshake Day
hiv awareness

Hiv Awareness Day
me

Me Day
brow

Brow Day
azonto is acceptable

Azonto Is Acceptable Day
promposal

Promposal Day
prescription drug take back

Prescription Drug Take Back Day