Oops, it doesn't look like 'celebrity shut the fuck up day' is a national day..

Other days

coffee

Coffee Day
nae nae

Nae Nae Day
artists

Artists Day
tulip

Tulip Day
camera

Camera Day
frozen yogurt

Frozen Yogurt Day
nail polish

Nail Polish Day
book

Book Day
boba

Boba Day
comfy

Comfy Day