namespace System

 {

 namespace Dateutils

 {

 extern const Extended OneHour /*= 4.166667E-02*/;

 extern const Extended OneMinute /*= 6.944444E-04*/;

 extern const Extended OneSecond /*= 1.157407E-05*/;

 extern const Extended OneMillisecond /*= 1.157407E-08*/;

 extern const Extended EpochAsJulianDate /*= 2.415018E+06*/;

 }    /* namespace Dateutils */

 }    /* namespace System */

 namespace System

 {

 namespace Dateutils

 {

 enum DECLSPEC_DENUM TLocalTimeType : unsigned char { lttStandard, lttDaylight, lttAmbiguous, lttInvalid };

 class PASCALIMPLEMENTATION TTimeZone : public TObject

 {

     typedef TObject inherited;

 private:

     static TTimeZone* FLocal;

 private:

     // __classmethod void __fastcall Create@();

     // __classmethod void __fastcall Destroy@();

 private:

     UnicodeString __fastcall GetAbbreviationForNow(void);

     UnicodeString __fastcall GetDisplayNameForNow(void);

     __int64 __fastcall GetUtcOffsetInSeconds(const TDateTime ADateTime, const bool ForceDaylight);

     Timespan::TTimeSpan __fastcall GetCurrentUtcOffset(void);

 protected:

     virtual void __fastcall DoGetOffsetsAndType(const TDateTime ADateTime, /* out */ __int64 &AOffset, /* out */ __int64 &ADstSave, /* out */ TLocalTimeType &AType) =  ;

     virtual UnicodeString __fastcall DoGetDisplayName(const TDateTime ADateTime, const bool ForceDaylight) =  ;

     virtual UnicodeString __fastcall DoGetID(void) =  ;

 public:

     Timespan::TTimeSpan __fastcall GetUtcOffset(const TDateTime ADateTime, const bool ForceDaylight = false);

     TDateTime __fastcall ToUniversalTime(const TDateTime ADateTime, const bool ForceDaylight = false);

     TDateTime __fastcall ToLocalTime(const TDateTime ADateTime);

     UnicodeString __fastcall GetDisplayName(const TDateTime ADateTime, const bool ForceDaylight = false);

     UnicodeString __fastcall GetAbbreviation(const TDateTime ADateTime, const bool ForceDaylight = false);

     TLocalTimeType __fastcall GetLocalTimeType(const TDateTime ADateTime);

     bool __fastcall IsStandardTime(const TDateTime ADateTime, const bool ForceDaylight = false);

     bool __fastcall IsInvalidTime(const TDateTime ADateTime);

     bool __fastcall IsAmbiguousTime(const TDateTime ADateTime);

     bool __fastcall IsDaylightTime(const TDateTime ADateTime, const bool ForceDaylight = false);

     __property UnicodeString ID = {read=DoGetID};

     __property UnicodeString DisplayName = {read=GetDisplayNameForNow};

     __property UnicodeString Abbreviation = {read=GetAbbreviationForNow};

     __property Timespan::TTimeSpan UtcOffset = {read=GetCurrentUtcOffset};

     /* static */ __property TTimeZone* Local = {read=FLocal};

 public:

     /* TObject.Create */ inline __fastcall TTimeZone(void) : TObject() { }

     /* TObject.Destroy */ inline __fastcall virtual ~TTimeZone(void) { }

 };

 //-- var, const, procedure ---------------------------------------------------

 static const Int8 DaysPerWeek = Int8(0x7);

 static const Int8 WeeksPerFortnight = Int8(0x2);

 static const Int8 MonthsPerYear = Int8(0xc);

 static const Int8 YearsPerDecade = Int8(0xa);

 static const Int8 YearsPerCentury = Int8(0x64);

 static const Word YearsPerMillennium = Word(0x3e8);

 static const Int8 DayMonday = Int8(0x1);

 static const Int8 DayTuesday = Int8(0x2);

 static const Int8 DayWednesday = Int8(0x3);

 static const Int8 DayThursday = Int8(0x4);

 static const Int8 DayFriday = Int8(0x5);

 static const Int8 DaySaturday = Int8(0x6);

 static const Int8 DaySunday = Int8(0x7);

 static const Int8 MonthJanuary = Int8(0x1);

 static const Int8 MonthFebruary = Int8(0x2);

 static const Int8 MonthMarch = Int8(0x3);

 static const Int8 MonthApril = Int8(0x4);

 static const Int8 MonthMay = Int8(0x5);

 static const Int8 MonthJune = Int8(0x6);

 static const Int8 MonthJuly = Int8(0x7);

 static const Int8 MonthAugust = Int8(0x8);

 static const Int8 MonthSeptember = Int8(0x9);

 static const Int8 MonthOctober = Int8(0xa);

 static const Int8 MonthNovember = Int8(0xb);

 static const Int8 MonthDecember = Int8(0xc);

 static const __int64 EpochAsUnixDate = -0x0000000083ad2180LL;

  StaticArray<Word, > DaysPerYear;

 static const Word RecodeLeaveFieldAsIs = Word(0xffff);

  double ApproxDaysPerMonth;

  double ApproxDaysPerYear;

  TDateTime __fastcall DateOf(const TDateTime AValue);

  TDateTime __fastcall TimeOf(const TDateTime AValue);

  bool __fastcall IsInLeapYear(const TDateTime AValue);

  bool __fastcall IsPM(const TDateTime AValue);

  bool __fastcall IsAM(const TDateTime AValue);

  bool __fastcall IsValidDate(const Word AYear, const Word AMonth, const Word ADay);

  bool __fastcall IsValidTime(const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond);

  bool __fastcall IsValidDateTime(const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond);

  bool __fastcall IsValidDateMonthWeek(const Word AYear, const Word AMonth, const Word AWeekOfMonth, const Word ADayOfWeek);

  bool __fastcall IsValidDateDay(const Word AYear, const Word ADayOfYear);

  bool __fastcall IsValidDateWeek(const Word AYear, const Word AWeekOfYear, const Word ADayOfWeek);

  Word __fastcall DaysInYear(const TDateTime AValue);

  Word __fastcall DaysInAYear(const Word AYear);

  Word __fastcall DaysInMonth(const TDateTime AValue);

  Word __fastcall DaysInAMonth(const Word AYear, const Word AMonth);

  Word __fastcall WeeksInYear(const TDateTime AValue);

  Word __fastcall WeeksInAYear(const Word AYear);

  TDateTime __fastcall Today(void);

  TDateTime __fastcall Yesterday(void);

  TDateTime __fastcall Tomorrow(void);

  bool __fastcall IsToday(const TDateTime AValue);

  bool __fastcall IsSameDay(const TDateTime AValue, const TDateTime ABasis);

  Word __fastcall YearOf(const TDateTime AValue);

  Word __fastcall MonthOf(const TDateTime AValue);

  Word __fastcall WeekOf(const TDateTime AValue);

  Word __fastcall DayOf(const TDateTime AValue);

  Word __fastcall HourOf(const TDateTime AValue);

  Word __fastcall MinuteOf(const TDateTime AValue);

  Word __fastcall SecondOf(const TDateTime AValue);

  Word __fastcall MilliSecondOf(const TDateTime AValue);

  TDateTime __fastcall StartOfTheYear(const TDateTime AValue);

  TDateTime __fastcall EndOfTheYear(const TDateTime AValue);

  TDateTime __fastcall StartOfTheMonth(const TDateTime AValue);

  TDateTime __fastcall EndOfTheMonth(const TDateTime AValue);

  TDateTime __fastcall StartOfTheWeek(const TDateTime AValue);

  TDateTime __fastcall EndOfTheWeek(const TDateTime AValue);

  TDateTime __fastcall StartOfTheDay(const TDateTime AValue);

  TDateTime __fastcall EndOfTheDay(const TDateTime AValue);

  TDateTime __fastcall StartOfAYear(const Word AYear);

  TDateTime __fastcall EndOfAYear(const Word AYear);

  TDateTime __fastcall StartOfAMonth(const Word AYear, const Word AMonth);

  TDateTime __fastcall EndOfAMonth(const Word AYear, const Word AMonth);

  TDateTime __fastcall StartOfAWeek(const Word AYear, const Word AWeekOfYear, const Word ADayOfWeek = (Word)(0x1));

  TDateTime __fastcall EndOfAWeek(const Word AYear, const Word AWeekOfYear, const Word ADayOfWeek = (Word)(0x7));

  TDateTime __fastcall StartOfADay(const Word AYear, const Word ADayOfYear)/* overload */;

  TDateTime __fastcall EndOfADay(const Word AYear, const Word ADayOfYear)/* overload */;

  TDateTime __fastcall StartOfADay(const Word AYear, const Word AMonth, const Word ADay)/* overload */;

  TDateTime __fastcall EndOfADay(const Word AYear, const Word AMonth, const Word ADay)/* overload */;

  Word __fastcall MonthOfTheYear(const TDateTime AValue);

  Word __fastcall WeekOfTheYear(const TDateTime AValue)/* overload */;

  Word __fastcall WeekOfTheYear(const TDateTime AValue, Word &AYear)/* overload */;

  Word __fastcall DayOfTheYear(const TDateTime AValue);

  Word __fastcall HourOfTheYear(const TDateTime AValue);

  unsigned __fastcall MinuteOfTheYear(const TDateTime AValue);

  unsigned __fastcall SecondOfTheYear(const TDateTime AValue);

  __int64 __fastcall MilliSecondOfTheYear(const TDateTime AValue);

  Word __fastcall WeekOfTheMonth(const TDateTime AValue)/* overload */;

  Word __fastcall WeekOfTheMonth(const TDateTime AValue, Word &AYear, Word &AMonth)/* overload */;

  Word __fastcall DayOfTheMonth(const TDateTime AValue);

  Word __fastcall HourOfTheMonth(const TDateTime AValue);

  Word __fastcall MinuteOfTheMonth(const TDateTime AValue);

  unsigned __fastcall SecondOfTheMonth(const TDateTime AValue);

  unsigned __fastcall MilliSecondOfTheMonth(const TDateTime AValue);

  Word __fastcall DayOfTheWeek(const TDateTime AValue);

  Word __fastcall HourOfTheWeek(const TDateTime AValue);

  Word __fastcall MinuteOfTheWeek(const TDateTime AValue);

  unsigned __fastcall SecondOfTheWeek(const TDateTime AValue);

  unsigned __fastcall MilliSecondOfTheWeek(const TDateTime AValue);

  Word __fastcall HourOfTheDay(const TDateTime AValue);

  Word __fastcall MinuteOfTheDay(const TDateTime AValue);

  unsigned __fastcall SecondOfTheDay(const TDateTime AValue);

  unsigned __fastcall MilliSecondOfTheDay(const TDateTime AValue);

  Word __fastcall MinuteOfTheHour(const TDateTime AValue);

  Word __fastcall SecondOfTheHour(const TDateTime AValue);

  unsigned __fastcall MilliSecondOfTheHour(const TDateTime AValue);

  Word __fastcall SecondOfTheMinute(const TDateTime AValue);

  unsigned __fastcall MilliSecondOfTheMinute(const TDateTime AValue);

  Word __fastcall MilliSecondOfTheSecond(const TDateTime AValue);

  bool __fastcall WithinPastYears(const TDateTime ANow, const TDateTime AThen, const int AYears);

  bool __fastcall WithinPastMonths(const TDateTime ANow, const TDateTime AThen, const int AMonths);

  bool __fastcall WithinPastWeeks(const TDateTime ANow, const TDateTime AThen, const int AWeeks);

  bool __fastcall WithinPastDays(const TDateTime ANow, const TDateTime AThen, const int ADays);

  bool __fastcall WithinPastHours(const TDateTime ANow, const TDateTime AThen, const __int64 AHours);

  bool __fastcall WithinPastMinutes(const TDateTime ANow, const TDateTime AThen, const __int64 AMinutes);

  bool __fastcall WithinPastSeconds(const TDateTime ANow, const TDateTime AThen, const __int64 ASeconds);

  bool __fastcall WithinPastMilliSeconds(const TDateTime ANow, const TDateTime AThen, const __int64 AMilliSeconds);
Between
  int __fastcall YearsBetween(const TDateTime ANow, const TDateTime AThen);

  int __fastcall MonthsBetween(const TDateTime ANow, const TDateTime AThen);

  int __fastcall WeeksBetween(const TDateTime ANow, const TDateTime AThen);

  int __fastcall DaysBetween(const TDateTime ANow, const TDateTime AThen);

  __int64 __fastcall HoursBetween(const TDateTime ANow, const TDateTime AThen);

  __int64 __fastcall MinutesBetween(const TDateTime ANow, const TDateTime AThen);

  __int64 __fastcall SecondsBetween(const TDateTime ANow, const TDateTime AThen);

  __int64 __fastcall MilliSecondsBetween(const TDateTime ANow, const TDateTime AThen);

  bool __fastcall DateTimeInRange(TDateTime ADateTime, TDateTime AStartDateTime, TDateTime AEndDateTime, bool aInclusive = true);

  bool __fastcall TimeInRange(TTime ATime, TTime AStartTime, TTime AEndTime, bool AInclusive = true);

  bool __fastcall DateInRange(TDate ADate, TDate AStartDate, TDate AEndDate, bool AInclusive = true);

  double __fastcall YearSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall MonthSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall WeekSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall DaySpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall HourSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall MinuteSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall SecondSpan(const TDateTime ANow, const TDateTime AThen);

  double __fastcall MilliSecondSpan(const TDateTime ANow, const TDateTime AThen);

  TDateTime __fastcall IncYear(const TDateTime AValue, const int ANumberOfYears = 0x1);

  TDateTime __fastcall IncWeek(const TDateTime AValue, const int ANumberOfWeeks = 0x1);

  TDateTime __fastcall IncDay(const TDateTime AValue, const int ANumberOfDays = 0x1);

 #ifndef _WIN64

  TDateTime __fastcall IncHour(const TDateTime AValue, const __int64 ANumberOfHours = 1LL);

  TDateTime __fastcall IncMinute(const TDateTime AValue, const __int64 ANumberOfMinutes = 1LL);

  TDateTime __fastcall IncSecond(const TDateTime AValue, const __int64 ANumberOfSeconds = 1LL);

  TDateTime __fastcall IncMilliSecond(const TDateTime AValue, const __int64 ANumberOfMilliSeconds = 1LL);

 #else /* _WIN64 */

  TDateTime __fastcall IncHour(const TDateTime AValue, const __int64 ANumberOfHours = (__int64)(1LL));

  TDateTime __fastcall IncMinute(const TDateTime AValue, const __int64 ANumberOfMinutes = (__int64)(1LL));

  TDateTime __fastcall IncSecond(const TDateTime AValue, const __int64 ANumberOfSeconds = (__int64)(1LL));

  TDateTime __fastcall IncMilliSecond(const TDateTime AValue, const __int64 ANumberOfMilliSeconds = (__int64)(1LL));

 #endif /* _WIN64 */

  TDateTime __fastcall EncodeDateTime(const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond);

  void __fastcall DecodeDateTime(const TDateTime AValue, /* out */ Word &AYear, /* out */ Word &AMonth, /* out */ Word &ADay, /* out */ Word &AHour, /* out */ Word &AMinute, /* out */ Word &ASecond, /* out */ Word &AMilliSecond);

  TDateTime __fastcall EncodeDateWeek(const Word AYear, const Word AWeekOfYear, const Word ADayOfWeek = (Word)(0x1));

  void __fastcall DecodeDateWeek(const TDateTime AValue, /* out */ Word &AYear, /* out */ Word &AWeekOfYear, /* out */ Word &ADayOfWeek);

  TDateTime __fastcall EncodeDateDay(const Word AYear, const Word ADayOfYear);

  void __fastcall DecodeDateDay(const TDateTime AValue, /* out */ Word &AYear, /* out */ Word &ADayOfYear);

  TDateTime __fastcall EncodeDateMonthWeek(const Word AYear, const Word AMonth, const Word AWeekOfMonth, const Word ADayOfWeek);

  void __fastcall DecodeDateMonthWeek(const TDateTime AValue, /* out */ Word &AYear, /* out */ Word &AMonth, /* out */ Word &AWeekOfMonth, /* out */ Word &ADayOfWeek);

  bool __fastcall TryEncodeDateTime(const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond, /* out */ TDateTime &AValue);

  bool __fastcall TryEncodeDateWeek(const Word AYear, const Word AWeekOfYear, /* out */ TDateTime &AValue, const Word ADayOfWeek = (Word)(0x1));

  bool __fastcall TryEncodeDateDay(const Word AYear, const Word ADayOfYear, /* out */ TDateTime &AValue);

  bool __fastcall TryEncodeDateMonthWeek(const Word AYear, const Word AMonth, const Word AWeekOfMonth, const Word ADayOfWeek, TDateTime &AValue);

  TDateTime __fastcall RecodeYear(const TDateTime AValue, const Word AYear);

  TDateTime __fastcall RecodeMonth(const TDateTime AValue, const Word AMonth);

  TDateTime __fastcall RecodeDay(const TDateTime AValue, const Word ADay);

  TDateTime __fastcall RecodeHour(const TDateTime AValue, const Word AHour);

  TDateTime __fastcall RecodeMinute(const TDateTime AValue, const Word AMinute);

  TDateTime __fastcall RecodeSecond(const TDateTime AValue, const Word ASecond);

  TDateTime __fastcall RecodeMilliSecond(const TDateTime AValue, const Word AMilliSecond);

  TDateTime __fastcall RecodeDate(const TDateTime AValue, const Word AYear, const Word AMonth, const Word ADay);

  TDateTime __fastcall RecodeTime(const TDateTime AValue, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond);

  TDateTime __fastcall RecodeDateTime(const TDateTime AValue, const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond);

  bool __fastcall TryRecodeDateTime(const TDateTime AValue, const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond, /* out */ TDateTime &AResult);

  Types::TValueRelationship __fastcall CompareDateTime(const TDateTime A, const TDateTime B);

  bool __fastcall SameDateTime(const TDateTime A, const TDateTime B);

  Types::TValueRelationship __fastcall CompareDate(const TDateTime A, const TDateTime B);

  bool __fastcall SameDate(const TDateTime A, const TDateTime B);

  Types::TValueRelationship __fastcall CompareTime(const TDateTime A, const TDateTime B);

  bool __fastcall SameTime(const TDateTime A, const TDateTime B);

  Word __fastcall NthDayOfWeek(const TDateTime AValue);

  void __fastcall DecodeDayOfWeekInMonth(const TDateTime AValue, /* out */ Word &AYear, /* out */ Word &AMonth, /* out */ Word &ANthDayOfWeek, /* out */ Word &ADayOfWeek);

  TDateTime __fastcall EncodeDayOfWeekInMonth(const Word AYear, const Word AMonth, const Word ANthDayOfWeek, const Word ADayOfWeek);

  bool __fastcall TryEncodeDayOfWeekInMonth(const Word AYear, const Word AMonth, const Word ANthDayOfWeek, const Word ADayOfWeek, /* out */ TDateTime &AValue);

  double __fastcall DateTimeToJulianDate(const TDateTime AValue);

  TDateTime __fastcall JulianDateToDateTime(const double AValue);

  bool __fastcall TryJulianDateToDateTime(const double AValue, /* out */ TDateTime &ADateTime);

  double __fastcall DateTimeToModifiedJulianDate(const TDateTime AValue);

  TDateTime __fastcall ModifiedJulianDateToDateTime(const double AValue);

  bool __fastcall TryModifiedJulianDateToDateTime(const double AValue, /* out */ TDateTime &ADateTime);

  __int64 __fastcall DateTimeToUnix(const TDateTime AValue, bool AInputIsUTC = true);

  TDateTime __fastcall UnixToDateTime(const __int64 AValue, bool AReturnUTC = true);

  void __fastcall InvalidDateTimeError(const Word AYear, const Word AMonth, const Word ADay, const Word AHour, const Word AMinute, const Word ASecond, const Word AMilliSecond, const TDateTime ABaseDate = 0.000000E+00);

  void __fastcall InvalidDateWeekError(const Word AYear, const Word AWeekOfYear, const Word ADayOfWeek);

  void __fastcall InvalidDateDayError(const Word AYear, const Word ADayOfYear);

  void __fastcall InvalidDateMonthWeekError(const Word AYear, const Word AMonth, const Word AWeekOfMonth, const Word ADayOfWeek);

  void __fastcall InvalidDayOfWeekInMonthError(const Word AYear, const Word AMonth, const Word ANthDayOfWeek, const Word ADayOfWeek);

  UnicodeString __fastcall DateToISO8601(const TDateTime ADate, bool AInputIsUTC = true);

  TDateTime __fastcall ISO8601ToDate(const UnicodeString AISODate, bool AReturnUTC = true);

  bool __fastcall TryISO8601ToDate(const UnicodeString AISODate, /* out */ TDateTime &Value, bool AReturnUTC = true);

 }    /* namespace Dateutils */

 }    /* namespace System */