function tsToObj(ts, offset) {
  ts += offset * 60 * 1000;

  const d = new Date(ts);

  return {
    year: d.getUTCFullYear(),
    month: d.getUTCMonth() + 1,
    day: d.getUTCDate(),
    hour: d.getUTCHours(),
    minute: d.getUTCMinutes(),
    second: d.getUTCSeconds(),
    millisecond: d.getUTCMilliseconds()
  };
}