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

Other days

gum

Gum Day
nae nae

Nae Nae Day
camera

Camera Day
slime

Slime Day
boba

Boba Day
kiss a ginger

Kiss A Ginger Day
frozen yogurt

Frozen Yogurt Day
bonang

Bonang Day
ruby

Ruby Day
believe

Believe Day