Historical clue formulations

• So on and so forth — 2019-07-26
• 1979 film whose name comes from a "Chicago" song — 2017-09-15
• Related add-ons, informally — 2014-10-28
• Semiautobiographical Bob Fosse film — 2008-04-29
• Similar but unspecified things — 1996-05-08