ampm on the date time picker

When I set the am pm in the date picker and click now during the am hours then on the date it will display the pm time and the text box with am. When clicking done it reverts back to pm in the text box even though it is during the am hours.

<input type="text" name="begin" id="begin" value="">

<script>

$('#begin').datetimepicker({ampm: true});

</script>