Historical clue formulations

• Popped in for just a moment, perhaps — 2021-09-05
• Greeted someone — 2020-01-10
• Extended a greeting — 2017-06-15
• Greeted someone — 2014-08-01
• Lightly hailed? — 2013-10-05
• Greeted informally — 2012-02-27
• Didn't just wave — 2011-04-16
• Greeted, with "to" — 2008-07-15
• Greeted informally — 2006-01-22