Oops, it doesn't look like 'i miss phil day' is a national day..

Other days

pumpkin

Pumpkin Day
boba

Boba Day
first love

First Love Day
lisp

Lisp Day
stud

Stud Day
ruby

Ruby Day
my little pony

My Little Pony Day
camera

Camera Day
youth

Youth Day
cat girl

Cat Girl Day