Historical clue formulations

• Sign on a restroom door — 2026-04-23
• Set of nine dancing in "The 12 Days of Christmas" — 2026-02-08
• Word before or after "first" — 2022-11-05
• The "L" of L.P.G.A. — 2022-10-18
• Beyoncé chart-topper "Single ___ (Put a Ring on It)" — 2021-10-10
• Aches and pains — 2020-03-05
• Restroom sign — 2018-12-23
• With 63-Across, what some performers saw in Las Vegas? ... or a hint to this puzzle's theme — 2017-12-27
• Gents' counterparts — 2013-06-10
• Part of L.P.G.A. — 2009-02-24
• Word that can precede or follow "first" — 2008-12-09
• Door sign — 2007-11-07
• Rest room designation — 2001-09-25
• Word on a door — 1996-10-30
• Start of a ringmaster's announcement — 1995-08-08