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

Other days

hoodie

Hoodie Day
me

Me Day
slime

Slime Day
self appreciation

Self Appreciation Day
special education

Special Education Day
hannah

Hannah Day
fiancee

Fiancee Day
camera

Camera Day
chocolate milkshake

Chocolate Milkshake Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day