Historical clue formulations

• Rabbit's tail — 2018-10-25
• ___ work (tedious tasks) — 2017-03-04
• ___ work — 2013-11-09
• Short tail — 2006-09-07
• Cottontail's tail — 2004-07-02
• ___ work (drudgery) — 2003-09-14
• Cottontail's tail — 2000-08-04
• Hare's tail — 1998-12-29
• Bunny's tail — 1998-07-14
• Rabbit's tail — 1995-10-08