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

Other days

brow

Brow Day
artists

Artists Day
eat what you want

Eat What You Want Day
carpenters

Carpenters Day
china

China Day
lash

Lash Day
kale

Kale Day
pampering

Pampering Day
boba

Boba Day
ruby

Ruby Day