What happened on September 19 ?

In ancient Greece, the sixth day of the Eleusinian Mysteries, when the procession to Eleusis began at the Kerameikos in Athens.

RC Saints - Saint Januarius

Also see September 19 (Eastern Orthodox liturgics)

Church of England - Theodore of Tarsus

Chile - Armed Forces Day

Japan - Respect for the Aged Day (traditional - beginning in 2003, the holiday is held on the third Monday of September.)

Saint Kitts and Nevis - Independence Day (from Great Britain, 1983)

International Talk Like a Pirate Day

Hermione Granger's birthday, from J.K. Rowling's series Harry Potter.

Heine Westenfluss's birthday, from Gundam SEED DESTINY.