Oops, it doesn't look like 'two minute silence day' is a national day..

Other days

bow tie

Bow Tie Day
cursing

Cursing Day
gum

Gum Day
pick me

Pick Me Day
coffee

Coffee Day
bubble bath

Bubble Bath Day
hoodie

Hoodie Day
camera

Camera Day
donate your hair

Donate Your Hair Day
fiancee

Fiancee Day