Below is a list of dates when Thanksgiving Day will occur from 3990 to 3999.
| Year | Date | Day |
|---|---|---|
| 3990 | November 22, 3990 | Thursday |
| 3991 | November 28, 3991 | Thursday |
| 3992 | November 26, 3992 | Thursday |
| 3993 | November 25, 3993 | Thursday |
| 3994 | November 24, 3994 | Thursday |
| 3995 | November 23, 3995 | Thursday |
| 3996 | November 28, 3996 | Thursday |
| 3997 | November 27, 3997 | Thursday |
| 3998 | November 26, 3998 | Thursday |
| 3999 | November 25, 3999 | Thursday |