Historical clue formulations

• B equivalent — 2023-05-21
• Harpist's home key — 2020-11-27
• B equivalent — 2020-03-19
• B equivalent — 2018-01-09
• Harp's home key — 2015-05-10
• Harp's home key — 2012-10-13
• B, essentially — 2010-01-24
• B, basically — 2005-06-05
• B another way — 2004-05-15
• Uncommon major — 1999-01-10
• B — 1997-05-01