Table:
text: 1981 Buffalo Bills season
Schedule
Schedule
Week Date_ Opponent Result_ Attendance
11 November 15, 1981 at St. Louis Cardinals L 24–0 46214
12 November 22, 1981 New England Patrios W 20–17 71593
13 November 29, 1981 Washington Redskins W 21–14 59624
14 December 6, 1981 San Diego Chargers W 28–27 51488
15 December 13, 1981 at New England Patriots W 19–10 42549
16 December 19, 1981 at Miami Dolphins L 16–6 72596

Question: What was the date of the game played after week 15 for the 1981 Buffalo Bills season schedule?