Oops, it doesn't look like 'read and no reply day' is a national day..

Other days

first love

First Love Day
ruby

Ruby Day
hoodie

Hoodie Day
self care

Self Care Day
law

Law Day
slime

Slime Day
chocolate milkshake

Chocolate Milkshake Day
pick me

Pick Me Day
nae nae

Nae Nae Day
fiancee

Fiancee Day