678日あるとしたら、その瞬間から何年、何ヶ月、何日あるのか計算する方法は?
Duration duration = Duration.FromStandardDays(678);
Instant now = SystemClock.Instance.Now;
Instant future = now + duration;
// I have to convert NodaTime.Instant to NodaTime.LocalDate but don't know how
Period period = Period.Between(now, future);
Console.WriteLine("{0} years, {1} months, {2} days", period.Years, period.Months, period.Days);