Historical clue formulations

• 30-day mo. — 2024-07-13
• Labor Day's mo. — 2024-02-05
• Equinox mo. — 2023-04-25
• 46-Down, in French — 2022-04-28
• Last month in the U.S. government's fiscal year: Abbr. — 2021-12-08
• 9/ — 2021-09-22
• Calendar abbr. that's also a French number — 2020-02-23
• Month number 60-Across: Abbr. — 2017-12-20
• Be Kind to Editors and Writers Mo. [for real!] — 2017-10-01
• 9/ — 2017-05-27
• Virgo/Libra mo. — 2017-05-03
• Vingt-___ (multiple de trois) — 2016-12-18
• Aug. follower — 2013-10-21
• Back-to-sch. time — 2012-05-20
• Mo. of Mexican Independence Day — 2011-06-21
• Deux into quatorze — 2010-11-27
• Quatre + trois — 2010-11-14
• A third of vingt-et-un — 2010-06-04
• Reaping time: Abbr. — 2010-04-16
• 9/ — 2009-11-15
• Number of dwarfs with Blanche Neige — 2009-10-28
• Nombre after six — 2009-05-01
• Harvest time: Abbr. — 2007-07-05
• Natl. Piano Mo. — 2006-06-29
• Labor Day mo. — 2006-05-15
• It has 720 hrs. — 2005-10-21
• Equinox mo. — 2004-10-18
• Back-to-school mo. — 2004-10-13
• Fall mo. — 2004-08-29
• 9: Abbr. — 2004-04-07
• Half of quatorze — 2004-02-27
• Ninth in a series: Abbr. — 2004-02-15
• Fall mo. — 2004-01-12
• Leaf-turning mo. — 2003-04-16
• When W.W. II began: Abbr. — 2002-10-26
• Cal. page — 2002-01-05
• Aug. follower — 2001-12-05
• Aug. follower — 2001-06-11
• Natl. Courtesy Month — 2001-04-22
• Back-to-school time: Abbr. — 2001-02-06
• Aug.'s follower — 2000-06-12
• Number after six — 2000-02-12
• Michaelmas's mo. — 2000-01-30
• Labor Day's mo. — 1998-08-17
• Back-to-school mo. — 1998-07-07
• Important school mo. — 1998-06-10
• Mo. when Libra starts — 1998-02-09
• Library Card Sign-Up Mo. — 1997-08-24
• Fall mo. — 1997-07-08
• Back-to-school time: Abbr. — 1997-03-04