Historical clue formulations

• When Hamilton and Burr had their duel — 2026-08-18
• When duelers may meet — 2018-03-04
• Very early — 2012-01-26
• When many duels were held — 2011-10-03
• When 58-Across occurs — 2009-06-13
• Time to crow — 2008-02-27
• When Alexander Hamilton and Aaron Burr dueled — 2007-07-17
• Early in the morning — 2007-02-21
• Early in the morning — 2005-02-25
• Early in the morning — 2003-02-27
• When many duels take place — 2001-11-07