scinote-web/app/assets/stylesheets/shared/datetime_picker.scss

.bootstrap-datetimepicker-widget {
  .glyphicon-calendar {
    margin: 0 !important;
  }

  .timepicker-picker {
    padding: 0 60px;

    td {
      height: initial;
      line-height: initial;

      a {
        padding: 0;
      }

      .timepicker-hour,
      .timepicker-minute {
        height: initial;
        line-height: initial;
        padding: 6px 0;
      }
    }

    .glyphicon-chevron-up, .glyphicon-chevron-down {
      align-items: center;
      display: flex;
      justify-content: center;
      height: 100%;
      line-height: 1;
    }

    .separator {
      width: 10px;
    }
  }
}