Historical clue formulations

• Eponymous Dr. Alzheimer — 2017-11-22
• Arnold Schwarzenegger's middle name — 2017-04-16
• Dr. Alzheimer — 2014-03-02
• Dr. Alzheimer — 2009-11-15
• Joseph ___ Ratzinger, birth name of Pope Benedict XVI — 2009-03-28
• Eponymous Dr. Alzheimer — 2009-03-22