Never mind,
I solved it.
Instead of using the --FormatRecordField-- option I changed the field type from PlainText to CUSTOM and changed the code manually:
LIST
from:
<span><?php echo $data['my_date']; ?></span>
to:
<span> <?php echo ((isset($data["my_date"]))?date('d/m/Y H:i:s',strtotime($data["my_date"])):""); ?></span>
VIEW
from:
<tr class="td-my_date">
<th class="title"> Date: </th>
<td class="value"><?php echo $data['my_date']; ?></td>
</tr>
to:
<tr class="td-my_date">
<th class="title"> Date: </th>
<td class="value"><?php echo ((isset($data["my_date"]))?date('d/m/Y H:i:s',strtotime($data["my_date"])):""); ?></td>
</tr>
Works fine!
HTH
Tony