Answer for SO Q22795924

Q22795924.cs

    int days = 678;

    // First, you need a starting point
    Instant now = SystemClock.Instance.Now;
    DateTimeZone timeZone = DateTimeZoneProviders.Bcl.GetSystemDefault(); // or whatever the applicable time zone is
    LocalDate today = now.InZone(timeZone).Date;

    // then just add the number of days
    LocalDate future = today.PlusDays(days);

    // and obtain a period with the units desired
    Period period = Period.Between(today, future, PeriodUnits.YearMonthDay);
    Console.WriteLine("{0} years, {1} months, {2} days", period.Years, period.Months, period.Days);