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.NET Framework  Namespace References  System  System.Collections  System.Globalization     Calendar   Class    CalendarWeekRule   Enumeration    CultureInfo   Class    CultureTypes   Enumeration    DateTimeFormatInfo   Class    DateTimeStyles   Enumeration    NumberFormatInfo   Class    NumberStyles   Enumeration    RegionInfo   Class    StringInfo   Class    TextElementEnumerator   Class    TextInfo   Class   System.Drawing - download only  System.IO  Articles and Tutorials  Overview of .NET  Delphi and .NET  Winform Applications  ASP .Net Applications  php Web Services  Framework Collections  Framework String Handling  Framework Files and Folders       System.Globalization.Calendar Class    Description The Calendar class differs from the System.DateTime structure. The latter essentially holds the number of ticks (0.0000001 second) since 00:00:00 1st January 0001 AD. Calendar converts such a DateTime value internally into a different set of date/time divisions for the particular calendar format it is set up for.   Although Calendar is not a set of static methods, it is not so different. It does not hold a DateTime value - it merely processes such a value via its methods according to its Calendar culture criteria.   For example, the System.Globalization.HebrewCalendar is a pre-made Calendar that derives from Calendar that has between 353 and 355 days per common year, and 383 to 385 days in a leap year.   So Calendar maps the number of ticks since 00:00 1st Jan 0001 AD in a DateTime object to a particular calendar format.   Calendar is an abstract class that cannot be directly constructed. Since a calendar is literally culuture dependant, it is constructed using the System.Globalization.CultureInfo class, namely the Calendar property. It is also often constructed using the CultureInfo.InvariantCluture.Calendar static property - this does not require a CultureInfo object instance.   See System.Globalization.CultureInfo for an example of constructing a Calendar object.   There are a number of pre-built classes that derive from Calendar :   System.Globalization.GregorianCalendar  System.Globalization.HebrewCalendar  System.Globalization.HijriCalendar  System.Globalization.JapaneseCalendar  System.Globalization.JulianCalendar  System.Globalization.KoreanCalendar  System.Globalization.TaiwanCalendar  System.Globalization.ThaiBuddhistCalendar    Take a look at the GetYear method for examples of British and Arabic Calendars.  Methods AddDays   Add a number of Days to a DateTime value AddHours   Add a number of Hours to a DateTime value AddMilliSeconds   Add a number of MilliSeconds to a DateTime value AddMinutes   Add a number of Minutes to a DateTime value AddMonths   Add a number of Months to a DateTime value AddSeconds   Add a number of Seconds to a DateTime value AddWeeks   Add a number of Weeks to a DateTime value AddYears   Add a number of Years to a DateTime value GetDayOfMonth   Return the DateTime Day of month according to the current Calendar GetDayOfWeek   Gets the specified DateTime Day of Week according to the current culture GetDayOfYear   Gets the specified DateTime Day of Year according to the current culture GetDaysInMonth   Gets the number of Days in a Month/Year according to the current Calendar GetDaysInYear   Gets the number of Days in a Year according to the current Calendar GetEra   Return the specified DateTime Era according to the current Calendar GetHour   Gets the specified DateTime Hour GetMilliSeconds   Gets the specified DateTime MilliSeconds GetMinute   Gets the specified DateTime Minute GetMonth   Return the specified DateTime Month according to the current Calendar GetMonthsInYear   Gets the number of Months in a Year according to the current Calendar GetSecond   Gets the specified DateTime Seconds GetWeekOfYear   Return the DateTime Week of Year according to the current Calendar GetYear   Return the specified DateTime Year according to the current Calendar IsLeapMonth   Is specified Year/Month a leap Month according to the current Calendar? IsLeapYear   Is specified Year a leap Year according to the current Calendar? ToDateTime   Builds a DateTime object from year, month, day and time values ToFourDigitYear   Converts a 2 digit year safely to a 4 digit year for the current Calendar  Fields CurrentEra    Integer    The current era (constant value)  Properties Eras    Array of Integer    Eras, starting with the most recent TowDigitYearMax    Integer    Max value for conversion to 4 digits  Delphi Basics links   System.Globalization.CultureInfo  Microsoft MSDN links   System.Globalization System.Globalization.calendar

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