Historical clue formulations

• A green one is helpful in a garden — 2021-08-02
• First digit — 2018-12-29
• Bad thing to hit with a hammer — 2018-11-25
• Something that turns up when you snap your fingers? — 2016-12-04
• Hitchhiker's digit — 2012-10-08
• Big print maker — 2009-04-30
• Hitcher's digit — 2008-08-20
• Green ___ — 2007-03-11
• Handy digit — 1999-07-11
• Browse (through) — 1996-01-09
• Hitchhiker's need — 1995-09-06