Historical clue formulations

• First stroke of the day — 2021-12-12
• When many New Year's parties begin to die down — 2021-05-27
• What takes a toll? — 2020-11-05
• Time in Boston when it's midnight in Austin — 2020-02-25
• When "S.N.L." ends on the East Coast — 2018-02-20
• A wee hour — 2017-06-20
• Hour in the graveyard shift — 2017-03-12
• Early hour — 2016-05-27
• Time to retire, maybe — 2014-09-25
• Weest of wee hours — 2014-09-24
• When New York's Central Park closes — 2014-07-11
• Wee hour — 2013-11-22
• Wee hour — 2013-04-02
• Wee hour — 2012-07-06
• Early hour — 2012-01-21
• What the ringing of two bells might signal on a ship — 2011-04-29
• Common time for 38-Across — 2011-03-24
• Late late hour — 2008-10-11
• Wee hour — 2008-09-19
• A stroke might indicate it — 2008-07-05
• Two bells, in a sailor's middle watch — 2008-03-20
• Witching hour follower — 2007-03-10
• Two bells, in the Navy — 2007-03-03
• Wee hour — 2007-02-28
• Time after retiring? — 2006-12-16
• Wee hour — 2006-10-17
• Wee hour — 2005-12-22
• Early hr. — 2005-07-10
• When "S.N.L." ends — 2005-02-17
• A wee hour — 2004-12-30
• Latish bedtime — 2004-10-26
• Latish bedtime — 2004-06-30
• A wee hour — 2004-05-06
• When "S.N.L." ends in N.Y.C. — 2003-04-28
• Wee hour — 2003-03-19
• Late bedtime — 2002-12-11
• A wee hr. — 2002-12-10
• When last call may be announced — 2002-08-23
• A wee hour — 1999-08-04
• Wee hour — 1999-05-27
• Bedtime for some — 1998-02-28
• Wee hour — 1997-08-07
• Late bedtime — 1997-06-22
• When "S.N.L." ends, in most places — 1995-09-17
• Late-late show hour — 1993-12-13