Oops, it doesn't look like 'slap a customer for being a rude asshole day' is a national day..

Other days

ruby

Ruby Day
cursing

Cursing Day
me

Me Day
special education

Special Education Day
azonto is acceptable

Azonto Is Acceptable Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
bubble bath

Bubble Bath Day
nae nae

Nae Nae Day
ask out your crush

Ask Out Your Crush Day
ormille

Ormille Day