cartodb/assets/stylesheets/editor-3/_datepicker.scss

// Date picker (calendar) styles
// --------------------------------------------------

.DatePicker-timers {
  display: flex;
  margin: 0 14px;
}

.DatePicker-timersField {
  display: flex;
  align-items: center;
}

.DatePicker-timersField--spaced {
  margin: 0 12px 0 34px;
}

.DatePicker-timersInput {
  width: 85px;
}

.DatePicker-timersInput .CDB-InputText {
  width: 45px;
}
// Hide sliders for number type, not needed for the calendar
.DatePicker-timersInput .CDB-OptionInput-item:first-child {
  display: none;
}