Historical clue formulations

• Placeholder abbr. — 2026-09-12
• Not yet decided, for short — 2026-07-29
• Still undecided, in brief — 2025-05-06
• Like the two Super Bowl teams in early January, for short — 2024-12-07
• Still up in the air, for short — 2024-11-04
• "We'll update you once we know," in brief — 2024-07-20
• Up in the air, for short — 2022-08-31
• Placeholder inits. — 2022-08-28