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 | Date Outgoing | Reason of departure | Replaced by | Date of Replacement |
| --- | --- | --- | --- | --- | --- |
| PSIS Semarang | Edi Paryono | July 23, 2008 | Sacked | Bambang Nurdiansyah | August 29, 2008 |
| PSMS Medan | Iwan Setiawan | August 1, 2008 | Sacked | Luciano Leandro | November 24, 2008 |
| Arema Malang | Bambang Nurdiansyah | August 5, 2008 | Resigned | Gusnul Yakin | August 14, 2008 |
| Persipura Jayapura | Raja Isa | August 20, 2008 | Mutual consent | Jacksen F. Tiago | August 26, 2008 |
| Persitara Jakarta Utara | Jacksen F. Tiago | August 26, 2008 | Signed by Persipura Jayapura | Dick Buitelaar | February 5, 2009 |
| Persiba Balikpapan | Peter Butler | September 26, 2008 | Sacked | Daniel Roekito | September 26, 2008 |
| PKT Bontang | Mustaqim | November 9, 2008 | Resigned | Fachry Husaini | November 12, 2008 |
| PSMS Medan | Luciano Leandro | February, 2009 | Sacked | Liestiade | February, 2009 |
Question:
When did Peter Butler leave his team?
Answer:
September 26, 2008