Historical clue formulations

• Used a shovel, say — 2023-07-03
• Vibed with — 2022-10-21
• Really liked — 2021-07-07
• Found groovy — 2020-12-28
• Grooved on — 2019-10-13
• Was really into — 2018-11-26
• Really liked — 2017-09-29
• Found really neat — 2017-07-11
• Loved, as archaeological work? — 2016-02-23
• Enjoyed muchly — 2014-10-04
• Made a ditch, say — 2014-06-16
• Considered groovy — 2008-06-06
• Broke ground — 2007-06-13
• Grooved on — 2006-08-21
• Searched for buried treasure — 2006-04-24
• Thought was really cool — 2004-04-02
• Shoveled — 2003-07-01
• Really liked, man — 1999-12-21
• Liked, hippie-style — 1999-07-27
• Grooved on — 1998-11-24
• Found groovy — 1998-01-04
• Went for — 1996-03-15
• Understood, slangily — 1995-09-16
• Liked loads — 1994-02-12