antd/es/date-picker/style/MonthPicker.less

An enterprise-class UI design language and React-based implementation

.@{calendar-prefix-cls}-month {
  height: 248px;
  .@{calendar-prefix-cls}-month-panel,
  .@{calendar-prefix-cls}-year-panel {
    top: 0;
    height: 100%;
  }
}