interface Locale {
  months: string[];
  monthsShort: string[];
  weekdays: string[];
  weekdaysShort: string[];
  weekdaysMin: string[];
  meridiem?: (hours: number, minutes: number, isLowercase: boolean) => string;
  meridiemParse?: RegExp;
  isPM?: (input: string) => boolean;
  ordinal?: () => string;
}

const locale = {
  // MMMM
  months: [
    'January',
    'February',
    'March',
    'April',
    'May',
    'June',
    'July',
    'August',
    'September',
    'October',
    'November',
    'December',
  ],
  // MMM
  monthsShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
  // dddd
  weekdays: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
  // ddd
  weekdaysShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
  // dd
  weekdaysMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
  // [A a] format the ampm. The following is the default value
  meridiem: (h: number, m: number, isLowercase: boolean) => {
    const word = h < 12 ? 'AM' : 'PM';
    return isLowercase ? word.toLocaleLowerCase() : word;
  };
  // [A a] used by parse to match the ampm. The following is the default value
  meridiemParse: /[ap]\.?m?\.?/i,
  // [A a] used by parse to determine if the matching string is pm. The following is the default value
  isPM: (input) => {
    return (input + '').toLowerCase().charAt(0) === 'p';
  }
};