$(document).on('ready pjax:scriptcomplete',function(){
 
  var minuteText = {
    'de': 'Minute',
    'en': 'Minute',
    'fr': 'Minute',
    'nl': 'Minuut'
  }
 
  var hourText = {
    'de': 'Stunde',
    'en': 'Hour',
    'fr': 'Heure',
    'nl': 'Uur'
  }
 
  var lang = $('html').attr('lang'); 
 
  $('.date select.form-control.hour option[value=""]').text(hourText[lang]);
  $('.date select.form-control.minute option[value=""]').text(minuteText[lang]);
});