Historical clue formulations

• Sydney's state: Abbr. — 2025-09-07
• Sydney's home, for short — 2023-11-24
• Sydney's state: Abbr. — 2022-12-01
• Its capital is Sydney: Abbr. — 2021-04-04
• Sydney's state: Abbr. — 2019-05-08
• State whose capital is 21-Down: Abbr. — 2018-05-27
• Sydney's state: Abbr. — 2017-03-08
• Neighbor of Victoria: Abbr. — 2016-09-03
• Neighbor of Victoria: Abbr. — 2016-05-12
• Its capital is Sydney: Abbr. — 2016-05-10
• Neighbor of Victoria: Abbr. — 2013-08-30
• Its capital is Sydney: Abbr. — 2012-12-23
• State bordering the Pacific: Abbr. — 2012-04-13
• Australian state: Abbr. — 2011-09-16
• Australian state whose capital is Sydney: Abbr. — 2011-08-08
• Australian state: Abbr. — 2009-06-28
• Sydney's home: Abbr. — 2006-08-17
• Australian state: Abbr. — 2005-11-06
• Australian state: Abbr. — 2005-08-04
• Where Sydney is: Abbr. — 2005-01-07
• Its cap. is Sydney — 2003-05-06
• Queensland neighbor: Abbr. — 1999-09-30
• Queensland neighbor: Abbr. — 1993-12-11