export function logTimestamp(date: Date = new Date()): string {
  const pad = (value: number, length = 2): string => String(value).padStart(length, "0");
  const offsetMinutes = -date.getTimezoneOffset();
  const sign = offsetMinutes >= 0 ? "+" : "-";
  const absOffset = Math.abs(offsetMinutes);
  const offset = `${sign}${pad(Math.floor(absOffset / 60))}:${pad(absOffset % 60)}`;
  return (
    `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}` +
    `T${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}.${pad(date.getMilliseconds(), 3)}${offset}`
  );
}