Historical clue formulations

• Word after age or before year — 2026-07-29
• Empty space between things — 2026-07-20
• Extra space — 2026-06-28
• Crevice — 2026-05-26
• Space between here and there — 2026-01-22
• Interval — 2026-01-17
• Lack of connectivity — 2025-12-03
• Opening, as between teeth — 2025-03-31
• Intervening period — 2024-06-09
• Break — 2024-05-25
• Interstice — 2023-10-12
• Tube feature, with "the" — 2023-09-29
• Separation — 2023-08-03
• Deficit in knowledge, e.g. — 2023-07-05
• Opening, as between teeth — 2023-03-27
• Thing to mind between the train and platform — 2022-09-12
• Blank space — 2022-08-10
• Distinct disparity — 2022-01-10
• "Mind the ___" (London tube sign) — 2021-09-08
• Opening to be filled — 2020-12-14
• Intervening space — 2020-10-19
• Break — 2020-10-18
• Interruption — 2020-09-19
• Break — 2020-07-16
• Disparity — 2019-11-27
• ___ year — 2019-11-14
• Parent company of Athleta and Old Navy — 2019-10-10
• Breach — 2019-07-04
• Chain with more than 3,500 stores worldwide — 2019-04-26
• Cumberland ___ — 2019-04-15
• Dental problem that braces can fix — 2019-03-25
• Space between two teeth, e.g. — 2019-02-18
• Clothing chain since 1969 — 2019-01-15
• Break — 2018-11-04
• Generation ___ — 2018-10-03
• Dental problem fixed by braces — 2018-07-16
• Interregnum — 2018-01-18
• Mystery in the fossil record — 2017-04-29
• ___ year (precollege experience) — 2016-06-21
• Cumberland ___ — 2015-08-03
• Generation ___ — 2015-07-14
• Feature of the Nixon tapes — 2015-05-03
• Dental problem — 2015-02-27
• Clothing chain with a "Baby" division — 2014-09-01
• ___-toothed — 2014-05-27
• Breach — 2013-08-27
• Generation ___ — 2013-05-29
• Cumberland ___ — 2012-12-17
• Orthodontist's concern — 2012-07-07
• Old Navy alternative — 2012-06-11