Oops, it doesn't look like 'but your yearbook day' is a national day..

Other days

singles

Singles Day
azonto is acceptable

Azonto Is Acceptable Day
self care

Self Care Day
lost sock memorial

Lost Sock Memorial Day
china

China Day
get funky

Get Funky Day
blanket fort

Blanket Fort Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
latina equal pay

Latina Equal Pay Day
emoji

Emoji Day