Historical clue formulations

• Outstanding, in a way — 2026-05-29
• In arrears — 2026-03-25
• In debt — 2023-09-24
• Not square, in a way — 2022-04-27
• Thanks (to) — 2021-11-21
• In the red — 2017-06-27
• Short, in a way — 2013-08-21
• Unpaid — 2013-06-29
• Taking credit? — 2011-02-11
• Seeing red? — 2009-01-09
• In debt — 2008-04-02
• In debt — 2007-11-27
• Due — 2005-06-19
• Behind — 2005-01-27
• Because of, with "to" — 2004-08-03
• Due (to) — 1996-02-18
• In the red — 1995-07-21
• Behind, in a way — 1994-01-29