react-dates-rtl/src/utils/getPhrasePropTypes.js

Based on react-dates by airbnb [with RTL support]

import PropTypes from 'prop-types';

export default function getPhrasePropTypes(defaultPhrases) {
  return Object.keys(defaultPhrases)
    .reduce((phrases, key) => ({
      ...phrases,
      [key]: PropTypes.oneOfType([PropTypes.string, PropTypes.func, PropTypes.node]),
    }), {});
}