Using 24 hour time in bootstrap timepicker

"YYYY-MM-DD HH:mm:ss" => 24 hours format;

"YYYY-MM-DD hh:mm:ss" => 12 hours format;

the difference is letter 'H'

$('.time-picker').timepicker({
            showMeridian: false     
        });

This will work.

Use capitals letter for hours HH = 24 hour format an hh = 12 hour format

$('#fecha').datetimepicker({
   format : 'DD/MM/YYYY HH:mm'
});

This works for me:

$(function () {
    $('#datetimepicker5').datetimepicker({
        use24hours: true,
        format: 'HH:mm'
    });
});

Important: It only worked at the point I used uppercase "H" as time format.

Related