Function startOfYear

pkgs/core/src/startOfYear/index.ts:33–44

(
  date: DateArg<DateType>,
  options?: StartOfYearOptions<ResultDate> | undefined,
)

 * //=> Wed Jan 01 2014 00:00:00
 */
export function startOfYear<
  DateType extends Date,
  ResultDate extends Date = DateType,
>(
  date: DateArg<DateType>,
  options?: StartOfYearOptions<ResultDate> | undefined,
): ResultDate {
  const date_ = toDate(date, options?.in);
  date_.setFullYear(date_.getFullYear(), 0, 1);
  date_.setHours(0, 0, 0, 0);
  return date_;
}