Historical clue formulations

• Snap — 2021-12-31
• Snapshot, informally — 2020-06-09
• Pic — 2018-08-15
• Snap — 2016-03-06
• Something developed casually? — 2015-01-31
• Pic — 2014-09-08
• Shot, informally — 2014-07-11
• Picture, informally — 2014-04-03
• Shot, informally — 2013-11-01
• Pic — 2013-02-19
• Pic — 2012-11-25
• Picture, commercially — 2011-02-13
• Pic — 2010-11-19
• Shot, informally — 2007-12-06
• Snap — 2007-11-04
• Picture, informally — 2002-04-28
• Picture, commercially — 1997-03-23
• Snapshot, Mad. Ave.-style — 1996-11-11
• Picture, in commercial names — 1996-05-22