.dhx_cal_container {
  width: 100%;
  height: 800px;
}

.dhx_cal_container .month_tab {
  left: 0 !important;
}

.dhx_cal_container .year_tab {
  left: 89px !important;
}

.dhx_cal_container .agenda_tab {
  left: 178px !important;
}

.dhx_cal_container .timeline_tab {
  left: 268px !important;
}