Historical clue formulations

• Never a dull ___ — 2019-10-14
• Second cousin? — 2016-10-20
• See 36-Across — 2013-07-28
• Heartbeat — 2012-01-22
• Significance — 2006-03-12
• Instant — 2003-03-05
• "One ___, please" — 2002-09-30
• "Not a _____ too soon" — 1995-03-20
• Tick of time — 1994-05-04