Historical clue formulations

• One might check a box for it — 2026-07-25
• Daily delivery — 2026-05-26
• Post-vacation pile — 2025-11-30
• Post — 2025-07-06
• Vote-by-___ (absentee option) — 2025-03-24
• Letters put in boxes — 2025-01-16
• Word after G or e — 2024-07-23
• Word after black or before box — 2024-03-19
• Much of it is junk — 2023-12-17
• Knight-wear? — 2023-07-09
• Something you may ask to have held while you're away — 2023-06-13
• Something that can be "dead" that was never alive — 2023-06-04
• With 37-Across, perform perfunctorily … or a hint to the ends of 16-, 25-, 41- and 55-Across — 2023-01-16
• Vote by ___ — 2021-10-29
• Knight's armor — 2021-10-13
• Buildup during vacation — 2020-02-27
• Post-vacation accumulation — 2019-03-01
• Daily ___ (British paper) — 2018-11-11
• A lot of it is junk — 2018-09-04
• Postal delivery — 2017-09-11
• Post office delivery — 2015-07-20
• Contents of some drop boxes — 2015-07-01
• Knightly wear — 2014-05-22
• Some airplane cargo — 2013-07-03
• 5-Across's business — 2012-10-23
• Word after e or G — 2012-10-03
• Knightwear? — 2012-07-01
• It's deposited in drops — 2012-06-16
• Daily delivery — 2012-02-28
• Letters — 2011-06-07
• Letters — 2010-06-20
• Letters — 2007-07-17
• Send off — 2006-12-29
• Letters — 2006-01-17
• Daily delivery — 2005-05-04
• Postal delivery — 2005-03-21
• Letters and packages — 2004-01-12
• Kind of call — 2003-06-20
• Postal delivery — 2001-01-01
• Kind of drop — 2000-05-07
• Some is junk — 2000-03-21
• Kind of call — 2000-03-12
• Armor of interlinked rings — 1999-12-14
• G.I.'s link with home — 1999-06-21
• Daily delivery — 1999-01-25
• Some of it is junk — 1998-07-06
• Daily delivery — 1998-05-06
• Camelot coat — 1998-03-11
• Pony Express load — 1998-02-02
• Knights' garb — 1997-01-08