Historical clue formulations

• Once, e.g. — 2026-04-10
• Tres o cuatro — 2025-08-12
• Uno or due — 2024-10-29
• Once, for one — 2024-10-04
• Quince, e.g. — 2014-06-29
• With 9-Down, tops — 2005-10-14
• Dos, e.g. — 2001-04-06
• Dos, e.g. — 1999-11-06
• It may be due overseas — 1995-09-09
• Every teléfono has one — 1995-01-08