Historical clue formulations

• Like most standardized tests — 2019-10-20
• By the clock — 2018-05-15
• Kept a watch on? — 2016-04-15
• Like lightning rounds — 2015-10-04
• Measured by a stopwatch — 2011-01-10
• Like Olympic races — 2008-04-26
• By the clock — 2004-09-05
• Under a stopwatch — 2001-05-21
• Like tournament chess games — 2001-04-11
• Like many tests — 1997-07-05