Historical clue formulations

• Extra sports period — 2022-02-08
• Reward for working late — 2019-07-24
• Paycheck fattener — 2007-12-05
• Source of more pay or more play — 2007-12-01
• A second shift, possibly — 2003-11-23
• Gradually — 2003-03-14
• Paycheck booster — 2000-03-21
• Tie breaker — 1995-08-12