Historical clue formulations

• Extra — 2025-09-28
• Worker's end-of-year wish — 2023-12-08
• Helping of gravy? — 2023-05-20
• Extra — 2022-03-06
• See 57-Across — 2012-12-20
• Christmas green? — 2012-02-24
• Boss's good news — 2010-07-14
• Paycheck extra — 2009-01-06
• Paycheck booster — 2007-06-26
• Extra $$$ — 2005-04-27
• Christmas wish — 2002-01-17
• Year-end check, maybe — 1998-09-29
• Worker's incentive — 1998-06-27
• Employee's reward — 1997-03-31
• Worker's reward — 1995-07-27
• Welcome surprise — 1994-06-25