All info here excerpted from The 2013 Autonomedia Calendar of Jubilee Saints: Radical Heroes for the New Millennium by James Koehnline and the Autonomedia Collective

APRIL 4 JUBILEE SAINT — DOROTHEA DIX
Advocate of humane treatment for so-called “mentally ill.”

APRIL 4 festivals:
* Ancient Rome: FESTIVAL OF THE MAGNA MATER OF PHRYGIA, a reliquary embodied in a small meteorite. An ecstatic procession with the magna mater in a chariot drawn by lions, castrated priests leaping and dancing and gashing themselves to a din of flutes, cymbals and drums.

ON THIS DATE
1802 — Mental health reformer, activist Dorothea Dix born, Hampden, Maine.
1900 — Prince of Wales, in Belgium, escapes anarchist assassination attempt.
1914 — French writer Marguerite Duras born, near Saigon, French Indochina.
1915 — Blues guitarist Muddy Waters born, Issaquena County, Mississippi.