Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Team | Outgoing manager | Manner of departure | Date of vacancy | Replaced by | Date of appointment | Position in table |
| --- | --- | --- | --- | --- | --- | --- |
| Bournemouth | Kevin Bond | Contract terminated | 1 September 2008 | Jimmy Quinn | 2 September 2008 | 23rd |
| Grimsby Town | Alan Buckley | Contract terminated | 15 September 2008 | Mike Newell | 6 October 2008 | 20th |
| Port Vale | Lee Sinnott | Mutual consent | 22 September 2008 | Dean Glover | 6 October 2008 | 16th |
| Chester City | Simon Davies | Contract terminated | 11 November 2008 | Mark Wright | 14 November 2008 | 19th |
| Barnet | Paul Fairclough | Resigned | 28 December 2008 | Ian Hendon | 21 April 2009 | 16th |
| Bournemouth | Jimmy Quinn | Contract terminated | 31 December 2008 | Eddie Howe | 31 December 2008 | 23rd |
Question:
what is the date of vacancy when the manner of departure is contract terminated, the position in table is 23rd and the date of appointment is 31 december 2008?
Answer:
31 December 2008