Oops, it doesn't look like 'air and space museum day' is a national day..

Other days

girl friend

Girl Friend Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

boy friend

Boy Friend Day

aloxolt

Aloxolt Day

ormille

Ormille Day

Emoji Day

first love

First Love Day

lumpy rug

Lumpy Rug Day

boyfriend

Boyfriend Day

appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day