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 |
| --- | --- | --- | --- | --- | --- | --- |
| Milton Keynes Dons | Paul Ince | Signed by Blackburn Rovers (mutual consent) | 22 June 2008 | Roberto Di Matteo | 2 July 2008 | Pre-season |
| Cheltenham Town | Keith Downing | Mutual consent | 13 September 2008 | Martin Allen | 15 September 2008 | 24th |
| Colchester United | Geraint Williams | Mutual consent | 22 September 2008 | Paul Lambert | 24 September 2008 | 23rd |
| Carlisle United | John Ward | Mutual consent | 3 November 2008 | Greg Abbott | 5 December 2008 | 20th |
| Huddersfield Town | Stan Ternent | Mutual consent | 4 November 2008 | Lee Clark | 11 December 2008 | 16th |
| Swindon Town | Maurice Malpas | Mutual consent | 14 November 2008 | Danny Wilson | 26 December 2008 | 16th |
| Crewe Alexandra | Steve Holland | Contract terminated | 18 November 2008 | Guðjón Þórðarson | 24 December 2008 | 24th |
| Hartlepool United | Danny Wilson | Contract terminated | 15 December 2008 | Chris Turner | 15 December 2008 | 13th |
| Leeds United | Gary McAllister | Contract terminated | 21 December 2008 | Simon Grayson | 23 December 2008 | 9th |
| Walsall | Jimmy Mullen | Contract terminated | 10 January 2009 | Chris Hutchings | 20 January 2009 | 12th |
| Leyton Orient | Martin Ling | Mutual Consent | 18 January 2009 | Geraint Williams | 5 February 2009 | 21st |
| Yeovil Town | Russell Slade | Contract terminated | 16 February 2009 | Terry Skiverton | 18 February 2009 | 16th |
| Brighton & Hove Albion | Micky Adams | Contract terminated | 21 February 2009 | Russell Slade | 6 March 2009 | 21st |
Question:
Which team appointed a person on 23 December 2008?
Answer:
Leeds United