Cannot change date input format in views exposed filter
Well, I am not proud of the clunky fix but it works!

function gmcvo_date_format_views_query_alter (&amp;$view, &amp;$query){
    $newDate = DateTime::createFromFormat('Y-d-m H:i:s', $query-&gt;where[1]['conditions'][0]['value']);
    $query-&gt;where[1]['conditions'][0]['value'] = $newDate-&gt;format('Y-m-d H:i:s');
}


If someone has a better way to do this it would be great to hear it...

edited to use the new datetime object instead of strtotime