function startOfDate(date, y, m, d) {
  return +new Date(
    y || date.getFullYear(),
    m == null ? date.getMonth() : m,
    d || date.getDate()
  );
}
function startOfTime(date, ms) {
  const input = +date;
  return input - input % ms;
}
export {
  startOfTime as a,
  startOfDate as s
};