Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
The Promise (Girls Aloud song)
Table title:
Release history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Region </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Label </th><th colspan=1 rowspan=1 > Format </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > Ireland </td><td class="highlighted"  colspan=1 rowspan=1 > 15 October 2008 </td><td colspan=1 rowspan=2 > Polydor Records </td><td class="highlighted"  colspan=1 rowspan=1 > CD single </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 19 October 2008 </td><td class="highlighted"  colspan=1 rowspan=2 > Digital download </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > United Kingdom </td><td colspan=1 rowspan=2 > Fascination Records </td></tr>
<tr> <td colspan=1 rowspan=1 > 20 October 2008 </td><td colspan=1 rowspan=1 > CD single </td></tr>
<tr> <td colspan=1 rowspan=2 > Germany </td><td colspan=1 rowspan=1 > 16 January 2009 </td><td colspan=1 rowspan=2 > Polydor Records </td><td colspan=1 rowspan=1 > Digital download </td></tr>
<tr> <td colspan=1 rowspan=1 > 27 March 2009 </td><td colspan=1 rowspan=1 > CD single </td></tr>
</table>
Question:
When was the Promise song released?
Answer:
The Promise song was released as a CD single in Ireland on October 15, 2008, followed by a digital release in Ireland and the United Kingdom on October 19.