Historical clue formulations

• National Arab American Heritage Month — 2025-10-19
• T.S. Eliot's (and the I.R.S.'s) "cruellest month" — 2025-06-24
• Earth Day month — 2024-07-22
• The "cruellest" month, per T.S. Eliot — 2024-05-07
• Earth Day month — 2023-10-30
• Name found on a calendar — 2023-06-25
• Busy month for accountants — 2022-06-06
• When the Lyrid meteor shower typically peaks — 2021-08-05
• When high school seniors often visit the colleges that accepted them — 2021-01-24
• Month of many unhappy returns? — 2020-07-06
• End of oyster season — 2019-09-29
• When the Lyrid meteor shower occurs — 2019-08-01
• When the Boston Marathon is held — 2018-09-29
• Early major-league game setting — 2018-09-15
• Much of Aries' span — 2018-08-05
• "___ fool!" — 2018-07-23
• Earth Day month — 2018-06-14
• When the N.B.A. regular season ends — 2018-03-15
• What "4" may stand for — 2018-02-04
• Spring segment — 2017-11-10
• Easter's month, usually — 2017-10-31
• It "hath put a spirit of youth in every thing," per Shakespeare — 2016-02-27
• Shower time — 2014-10-01
• Deadline time appropriate to this puzzle — 2014-04-13
• When to celebrate Earth Day — 2010-09-07
• Fourth of 12 — 2010-07-29
• Patriots' Day time — 2008-11-12
• "The uncertain glory of an ___ day": Shakespeare — 2008-06-12
• "___ Love," 1957 #1 hit by 13-Down — 2008-02-11
• First full month of spring — 2007-04-02
• Earth Day's month — 2007-02-27
• Taxing time — 2006-04-23
• Start of the second quarter — 2006-01-15
• National Poetry Month — 2005-10-06
• "___ Love" (1957 #1 hit) — 2005-09-22
• 4, sometimes — 2005-06-24
• Shower bringer — 2005-03-28
• March trailer — 2004-11-14
• Something that begins foolishly? — 2003-03-23
• When the Boston Marathon is held — 2003-02-26
• Patriots' Day month — 2003-02-19
• Pat Boone's "___ Love" — 2002-12-31
• Fool's month — 2002-12-10
• "The uncertain glory of an ___ day": Shak. — 2001-10-28
• You may get fooled when it arrives — 2001-05-17
• Patriots' Day month — 2001-05-08
• When Revere made that ride — 2000-11-02
• "The sweet small clumsy feet of ___": E. E. Cummings — 2000-04-02
• Fourth in a series — 1999-09-25
• When Earth Day is — 1998-10-30