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QDate(3qt)							    QDate(3qt)

NAME
       QDate - Date functions

SYNOPSIS
       All the functions in this class are reentrant when Qt is built with
       thread support.</p>

       #include <qdatetime.h>

   Public Members
       QDate ()
       QDate ( int y, int m, int d )
       bool isNull () const
       bool isValid () const
       int year () const
       int month () const
       int day () const
       int dayOfWeek () const
       int dayOfYear () const
       int daysInMonth () const
       int daysInYear () const
       int weekNumber ( int * yearNumber = 0 ) const
       QString toString ( Qt::DateFormat f = Qt::TextDate ) const
       QString toString ( const QString & format ) const
       bool setYMD ( int y, int m, int d )
       QDate addDays ( int ndays ) const
       QDate addMonths ( int nmonths ) const
       QDate addYears ( int nyears ) const
       int daysTo ( const QDate & d ) const
       bool operator== ( const QDate & d ) const
       bool operator!= ( const QDate & d ) const
       bool operator< ( const QDate & d ) const
       bool operator<= ( const QDate & d ) const
       bool operator> ( const QDate & d ) const
       bool operator>= ( const QDate & d ) const

   Static Public Members
       QString monthName ( int month )	(obsolete)
       QString dayName ( int weekday )	(obsolete)
       QString shortMonthName ( int month )
       QString shortDayName ( int weekday )
       QString longMonthName ( int month )
       QString longDayName ( int weekday )
       QDate currentDate ()
       QDate currentDate ( Qt::TimeSpec ts )
       QDate fromString ( const QString & s, Qt::DateFormat f = Qt::TextDate )
       bool isValid ( int y, int m, int d )
       bool leapYear ( int y )

RELATED FUNCTION DOCUMENTATION
       QDataStream & operator<< ( QDataStream & s, const QDate & d )
       QDataStream & operator>> ( QDataStream & s, QDate & d )

DESCRIPTION
       The QDate class provides date functions.

       A QDate object contains a calendar date, i.e. year, month, and day
       numbers, in the modern Western (Gregorian) calendar. It can read the
       current date from the system clock. It provides functions for comparing
       dates and for manipulating dates, e.g. by adding a number of days or
       months or years.

       A QDate object is typically created either by giving the year, month
       and day numbers explicitly, or by using the static function
       currentDate(), which creates a QDate object containing the system
       clock's date. An explicit date can also be set using setYMD(). The
       fromString() function returns a QDate given a string and a date format
       which is used to interpret the date within the string.

       The year(), month(), and day() functions provide access to the year,
       month, and day numbers. Also, dayOfWeek() and dayOfYear() functions are
       provided. The same information is provided in textual format by the
       toString(), shortDayName(), longDayName(), shortMonthName() and
       longMonthName() functions.

       QDate provides a full set of operators to compare two QDate objects
       where smaller means earlier and larger means later.

       You can increment (or decrement) a date by a given number of days using
       addDays(). Similarly you can use addMonths() and addYears(). The
       daysTo() function returns the number of days between two dates.

       The daysInMonth() and daysInYear() functions return how many days there
       are in this date's month and year, respectively. The leapYear()
       function indicates whether this date is in a leap year.

       Note that QDate should not be used for date calculations for dates
       prior to the introduction of the Gregorian calendar. This calendar was
       adopted by England from the 14<sup><small>th</small></sup> September
       1752 (hence this is the earliest valid QDate), and subsequently by most
       other Western countries, until 1923.

       The end of time is reached around the year 8000, by which time we
       expect Qt to be obsolete.

       See also QTime, QDateTime, QDateEdit, QDateTimeEdit, and Time and Date.

MEMBER FUNCTION DOCUMENTATION
QDate::QDate ()
       Constructs a null date. Null dates are invalid.

       See also isNull() and isValid().

QDate::QDate ( int y, int m, int d )
       Constructs a date with year y, month m and day d.

       y must be in the range 1752..8000, m must be in the range 1..12, and d
       must be in the range 1..31.

       Warning: If y is in the range 0..99, it is interpreted as 1900..1999.

       See also isValid().

QDate QDate::addDays ( int ndays ) const
       Returns a QDate object containing a date ndays later than the date of
       this object (or earlier if ndays is negative).

       See also addMonths(), addYears(), and daysTo().

QDate QDate::addMonths ( int nmonths ) const
       Returns a QDate object containing a date nmonths later than the date of
       this object (or earlier if nmonths is negative).

       See also addDays() and addYears().

QDate QDate::addYears ( int nyears ) const
       Returns a QDate object containing a date nyears later than the date of
       this object (or earlier if nyears is negative).

       See also addDays() and addMonths().

QDate QDate::currentDate ( Qt::TimeSpec ts ) [static]
       Returns the current date, as reported by the system clock, for the
       TimeSpec ts. The default TimeSpec is LocalTime.

       See also QTime::currentTime(), QDateTime::currentDateTime(), and
       Qt::TimeSpec.

       Example: dclock/dclock.cpp.

QDate QDate::currentDate () [static]
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       Returns the current date, as reported by the system clock.

       See also QTime::currentTime() and QDateTime::currentDateTime().

int QDate::day () const
       Returns the day of the month (1..31) of this date.

       See also year(), month(), and dayOfWeek().

       Example: dclock/dclock.cpp.

QString QDate::dayName ( int weekday ) [static]
       This function is obsolete. It is provided to keep old source working.
       We strongly advise against using it in new code.

       Use shortDayName() instead.

int QDate::dayOfWeek () const
       Returns the weekday (Monday=1..Sunday=7) for this date.

       See also day() and dayOfYear().

int QDate::dayOfYear () const
       Returns the day of the year (1..365) for this date.

       See also day() and dayOfWeek().

int QDate::daysInMonth () const
       Returns the number of days in the month (28..31) for this date.

       See also day() and daysInYear().

int QDate::daysInYear () const
       Returns the number of days in the year (365 or 366) for this date.

       See also day() and daysInMonth().

int QDate::daysTo ( const QDate & d ) const
       Returns the number of days from this date to d (which is negative if d
       is earlier than this date).

       Example:

	       QDate d1( 1995, 5, 17 );	 // May 17th 1995
	       QDate d2( 1995, 5, 20 );	 // May 20th 1995
	       d1.daysTo( d2 );		 // returns 3
	       d2.daysTo( d1 );		 // returns -3

       See also addDays().

QDate QDate::fromString ( const QString & s, Qt::DateFormat f = Qt::TextDate )
       [static]
       Returns the QDate represented by the string s, using the format f, or
       an invalid date if the string cannot be parsed.

       Note for Qt::TextDate: It is recommended that you use the English short
       month names (e.g. "Jan"). Although localized month names can also be
       used, they depend on the user's locale settings.

       Warning: Qt::LocalDate cannot be used here.

bool QDate::isNull () const
       Returns TRUE if the date is null; otherwise returns FALSE. A null date
       is invalid.

       See also isValid().

bool QDate::isValid () const
       Returns TRUE if this date is valid; otherwise returns FALSE.

       See also isNull().

bool QDate::isValid ( int y, int m, int d ) [static]
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       Returns TRUE if the specified date (year y, month m and day d) is
       valid; otherwise returns FALSE.

       Example:

	   QDate::isValid( 2002, 5, 17 );  // TRUE   May 17th 2002 is valid
	   QDate::isValid( 2002, 2, 30 );  // FALSE  Feb 30th does not exist
	   QDate::isValid( 2004, 2, 29 );  // TRUE   2004 is a leap year
	   QDate::isValid( 1202, 6, 6 );   // FALSE  1202 is pre-Gregorian

       Warning: A y value in the range 00..99 is interpreted as 1900..1999.

       See also isNull() and setYMD().

bool QDate::leapYear ( int y ) [static]
       Returns TRUE if the specified year y is a leap year; otherwise returns
       FALSE.

QString QDate::longDayName ( int weekday ) [static]
       Returns the long name of the weekday.

       1 = "Monday", 2 = "Tuesday", ... 7 = "Sunday"

       The day names will be localized according to the system's locale
       settings.

       See also toString(), shortDayName(), shortMonthName(), and
       longMonthName().

QString QDate::longMonthName ( int month ) [static]
       Returns the long name of the month.

       1 = "January", 2 = "February", ... 12 = "December"

       The month names will be localized according to the system's locale
       settings.

       See also toString(), shortMonthName(), shortDayName(), and
       longDayName().

int QDate::month () const
       Returns the month (January=1..December=12) of this date.

       See also year() and day().

       Example: dclock/dclock.cpp.

QString QDate::monthName ( int month ) [static]
       This function is obsolete. It is provided to keep old source working.
       We strongly advise against using it in new code.

       Use shortMonthName() instead.

bool QDate::operator!= ( const QDate & d ) const
       Returns TRUE if this date is different from d; otherwise returns FALSE.

bool QDate::operator<; ( const QDate & d ) const
       Returns TRUE if this date is earlier than d, otherwise returns FALSE.

bool QDate::operator<;= ( const QDate & d ) const
       Returns TRUE if this date is earlier than or equal to d, otherwise
       returns FALSE.

bool QDate::operator== ( const QDate & d ) const
       Returns TRUE if this date is equal to d; otherwise returns FALSE.

bool QDate::operator> ( const QDate & d ) const
       Returns TRUE if this date is later than d, otherwise returns FALSE.

bool QDate::operator>= ( const QDate & d ) const
       Returns TRUE if this date is later than or equal to d, otherwise
       returns FALSE.

bool QDate::setYMD ( int y, int m, int d )
       Sets the date's year y, month m and day d.

       y must be in the range 1752..8000, m must be in the range 1..12, and d
       must be in the range 1..31.

       Warning: If y is in the range 0..99, it is interpreted as 1900..1999.

       Returns TRUE if the date is valid; otherwise returns FALSE.

QString QDate::shortDayName ( int weekday ) [static]
       Returns the name of the weekday.

       1 = "Mon", 2 = "Tue", ... 7 = "Sun"

       The day names will be localized according to the system's locale
       settings.

       See also toString(), shortMonthName(), longMonthName(), and
       longDayName().

QString QDate::shortMonthName ( int month ) [static]
       Returns the name of the month.

       1 = "Jan", 2 = "Feb", ... 12 = "Dec"

       The month names will be localized according to the system's locale
       settings.

       See also toString(), longMonthName(), shortDayName(), and
       longDayName().

QString QDate::toString ( const QString & format ) const
       Returns the date as a string. The format parameter determines the
       format of the result string.

       These expressions may be used:

       <center>.nf

       </center>

       All other input characters will be ignored.

       Example format strings (assuming that the QDate is the
       20<sup><small>th</small></sup> July 1969): <center>.nf

       </center>

       If the date is an invalid date, then QString::null will be returned.

       See also QDateTime::toString() and QTime::toString().

QString QDate::toString ( Qt::DateFormat f = Qt::TextDate ) const
       This is an overloaded member function, provided for convenience. It
       behaves essentially like the above function.

       Returns the date as a string. The f parameter determines the format of
       the string.

       If f is Qt::TextDate, the string format is "Sat May 20 1995" (using the
       shortDayName() and shortMonthName() functions to generate the string,
       so the day and month names are locale specific).

       If f is Qt::ISODate, the string format corresponds to the ISO 8601
       specification for representations of dates, which is YYYY-MM-DD where
       YYYY is the year, MM is the month of the year (between 01 and 12), and
       DD is the day of the month between 01 and 31.

       If f is Qt::LocalDate, the string format depends on the locale settings
       of the system.

       If the date is an invalid date, then QString::null will be returned.

       See also shortDayName() and shortMonthName().

int QDate::weekNumber ( int * yearNumber = 0 ) const
       Returns the week number (1 to 53), and stores the year in *yearNumber
       unless yearNumber is null (the default).

       Returns 0 if the date is invalid.

       In accordance with ISO 8601, weeks start on Monday and the first
       Thursday of a year is always in week 1 of that year. Most years have 52
       weeks, but some have 53.

       *yearNumber is not always the same as year(). For example, 1 January
       2000 has week number 52 in the year 1999, and 31 December 2002 has week
       number 1 in the year 2003.

       Copyright (c) 1989 The Regents of the University of California. All
       rights reserved.

       Redistribution and use in source and binary forms are permitted
       provided that the above copyright notice and this paragraph are
       duplicated in all such forms and that any documentation, advertising
       materials, and other materials related to such distribution and use
       acknowledge that the software was developed by the University of
       California, Berkeley. The name of the University may not be used to
       endorse or promote products derived from this software without specific
       prior written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND
       WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
       LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
       PARTICULAR PURPOSE.

       See also isValid().

int QDate::year () const
       Returns the year (1752..8000) of this date.

       See also month() and day().

RELATED FUNCTION DOCUMENTATION
QDataStream & operator<;< ( QDataStream & s, const QDate & d )
       Writes the date, d, to the data stream, s.

       See also Format of the QDataStream operators.

QDataStream & operator>> ( QDataStream & s, QDate & d )
       Reads a date from the stream s into d.

       See also Format of the QDataStream operators.

SEE ALSO
       http://doc.trolltech.com/qdate.html
       http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
       license file included in the distribution for a complete license
       statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to
       help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is
       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
       web browser. This man page is provided as a convenience for those users
       who prefer man pages, although this format is not officially supported
       by Trolltech.

       If you find errors in this manual page, please report them to qt-
       bugs@trolltech.com.  Please include the name of the manual page
       (qdate.3qt) and the Qt version (3.3.8).

Trolltech AS			2 February 2007			    QDate(3qt)
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