Oops, it doesn't look like 'hug a stranger day' is a national day..

Other days

tulip

Tulip Day
ruby

Ruby Day
my little pony

My Little Pony Day
fiancee

Fiancee Day
ponytail

Ponytail Day
bonang

Bonang Day
self appreciation

Self Appreciation Day
reading

Reading Day
law

Law Day
boyfriend

Boyfriend Day