feature in regional settings - date

Here is my fix... im not php professional writer.

In editField.php, under showtime DIV (line 196 or so) add this:

<div class="label">Date Format</div>
<div>
<input type="hidden" name="euroStyle" value="0"/>
<input type="checkbox" id="date_eurostyle" name="euroStyle" value="1" <?php checkedIf($field['euroStyle'], '1') ?> />
<label for="date_eurostyle">European style date format (day, month, year)</label>
</div>

This will let you check european style date in cms.

In editField_functions.php
under line 20: $defaultValue['showTime'] = '1';
$defaultValue['euroStyle'] = '1'; // add this one

in line 278, fix date with:
'date' => array('customColumnType', 'order', 'label', 'type', 'isSystemField', 'adminOnly', 'isUnique', 'showTime', 'euroStyle', 'showSeconds', 'use24HourFormat', 'yearRangeStart', 'yearRangeEnd'),

and last.. in edit_functions.php around line 307 make this changes:

if ($fieldSchema['euroStyle']) {
print " <select name='{$fieldSchema['name']}:day'>$dayOptions</select>\n";
print " <select name='{$fieldSchema['name']}:mon'>$monthOptions</select>\n";
}
else {
print " <select name='{$fieldSchema['name']}:mon'>$monthOptions</select>\n";
print " <select name='{$fieldSchema['name']}:day'>$dayOptions</select>\n";
}

I hope this helps. Please, check my code, i fixed without check in deep.