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import toDate from '../toDate/index.ts'import requiredArgs from '../_lib/requiredArgs/index.ts'
/** * @name startOfQuarter * @category Quarter Helpers * @summary Return the start of a year quarter for the given date. * * @description * Return the start of a year quarter for the given date. * The result will be in the local timezone. * * ### v2.0.0 breaking changes: * * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes). * * @param {Date|Number} date - the original date * @returns {Date} the start of a quarter * @throws {TypeError} 1 argument required * * @example * // The start of a quarter for 2 September 2014 11:55:00: * const result = startOfQuarter(new Date(2014, 8, 2, 11, 55, 0)) * //=> Tue Jul 01 2014 00:00:00 */export default function startOfQuarter(dirtyDate: Date | number): Date {  requiredArgs(1, arguments)
  const date = toDate(dirtyDate)  const currentMonth = date.getMonth()  const month = currentMonth - (currentMonth % 3)  date.setMonth(month, 1)  date.setHours(0, 0, 0, 0)  return date}