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

Other days

lisp

Lisp Day
polyamory

Polyamory Day
kale

Kale Day
boy friend

Boy Friend Day
self appreciation

Self Appreciation Day
bubble bath

Bubble Bath Day
aloxolt

Aloxolt Day
artists

Artists Day
bonang

Bonang Day
promposal

Promposal Day