Historical clue formulations

• Brief period in nuclear physics: Abbr. — 2017-03-22
• Fraction of a min. — 2012-04-25
• Approx. camera flash duration — 2012-03-31
• Brief moment, briefly — 2012-01-21
• How long it takes light to travel 186 mi. — 2010-07-02
• Processing time unit: Abbr. — 2010-01-01
• Fraction of a tick: Abbr. — 2009-04-01
• Fraction of a min. — 2008-04-13
• Fraction of a min. — 2006-02-05
• Not much time: Abbr. — 2005-04-29
• Brief moment in time: Abbr. — 2002-09-29
• Very short time, for short — 1994-02-26