public static DateTime ToDateTime(this BdsDate bdsDate) => (DateTime)bdsDate;
public static YearDoY ToYearDoY(this BdsDate bdsDate) => (YearDoY)bdsDate;
public static GpsDate ToGpsDate(this BdsDate bdsDate) => (GpsDate)bdsDate;
public static DateTime ToDateTime(this BdsDate bdsDate) => (DateTime)bdsDate;
public static YearDoY ToYearDoY(this BdsDate bdsDate) => (YearDoY)bdsDate;
public static GpsDate ToGpsDate(this BdsDate bdsDate) => (GpsDate)bdsDate;