Historical clue formulations

• Crowd activity at a stadium — 2019-12-09
• Stand-up routine? — 2014-11-04
• Thousands of fans might do it — 2013-05-14
• Stand-up routine in a stadium? — 2013-04-02
• Stand-up routine? — 2009-01-31
• Motion made by fans in a stadium — 2008-08-18
• What oscillating fans do — 2004-10-30