public Date(int year, int month, int day)
{
if (year >= 0)
{
Year = new Year(year);
}
if (month >= 0)
{
Month = new Month(month);
}
if (day >= 0)
{
Day = new Day(day);
}
}
public ApproxDate(DateTimeOffset dt)
{
Year = new Year(dt.Year);
Month = new Month(dt.Month);
Day = new Day(dt.Day);
}