Historical clue formulations

• Drummer Starkey — 2019-11-03
• Drummer Starkey — 2017-04-28
• Director/ screenwriter Penn — 2013-08-24
• Ringo's drumming son — 2012-03-22
• Drummer Starkey — 2010-08-28
• Ringo's drummer son — 2009-12-28
• Ringo's drummer son — 2009-01-29
• Ringo's drummer son — 2008-08-10
• Ringo's eldest — 2007-09-23
• Ringo's oldest son — 2006-06-03
• Drummer Starkey, Ringo's son — 2003-12-14