ant-design/components/date-picker/locale/bg_BG.tsx

import CalendarLocale from 'rc-calendar/lib/locale/bg_BG';
import TimePickerLocale from '../../time-picker/locale/bg_BG';
import assign from 'object-assign';

// Merge into a locale object
const locale = {
  lang: assign({
    placeholder: 'Избор на дата',
    rangePlaceholder: ['Начална', 'Крайна'],
  }, CalendarLocale),
  timePickerLocale: assign({}, TimePickerLocale),
};

// All settings at:
// https://github.com/ant-design/ant-design/blob/master/components/date-picker/locale/example.json

export default locale;