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import toDate from "../toDate/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
 * @name lastDayOfYear
 * @category Year Helpers
 * @summary Return the last day of a year for the given date.
 *
 * @description
 * Return the last day of a year for the given date.
 * The result will be in the local timezone.
 *
 * @param {Date|Number} date - the original date
 * @returns {Date} the last day of a year
 * @throws {TypeError} 1 argument required
 *
 * @example
 * // The last day of a year for 2 September 2014 11:55:00:
 * const result = lastDayOfYear(new Date(2014, 8, 2, 11, 55, 00))
 * //=> Wed Dec 31 2014 00:00:00
 */
export default function lastDayOfYear(dirtyDate) {
  requiredArgs(1, arguments);
  var date = toDate(dirtyDate);
  var year = date.getFullYear();
  date.setFullYear(year + 1, 0, 0);
  date.setHours(0, 0, 0, 0);
  return date;
}