Historical clue formulations

• Weight measurement commonly known by only its second part — 2025-06-19
• Unit equal to 907.2 kilograms — 2022-05-20
• U.S. freight measure — 2015-08-15
• 2,000 pounds — 2013-11-24
• It has a slightly heavier British counterpart — 2006-05-13
• Avoirdupois weight unit — 1998-06-19