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

Other days

camera

Camera Day
hiv awareness

Hiv Awareness Day
healing

Healing Day
stud

Stud Day
stress awareness

Stress Awareness Day
boy friend

Boy Friend Day
gallery

Gallery Day
boba

Boba Day
gum

Gum Day
frozen yogurt

Frozen Yogurt Day