Oops, it doesn't look like 'Best Of Friends day' is a national day..

Other days

lash

Lash Day
reading

Reading Day
ponytail

Ponytail Day
girl friend

Girl Friend Day
boy friend

Boy Friend Day
ruby

Ruby Day
aloxolt

Aloxolt Day
boba

Boba Day
tulip

Tulip Day
lost sock memorial

Lost Sock Memorial Day