❤Qt number of days between two dates






❤ Click here: http://termplumebev.fastdownloadcloud.ru/dt?s=YToyOntzOjc6InJlZmVyZXIiO3M6MjE6Imh0dHA6Ly9iaXRiaW4uaXQyX2R0LyI7czozOiJrZXkiO3M6MzU6IlF0IG51bWJlciBvZiBkYXlzIGJldHdlZW4gdHdvIGRhdGVzIjt9




































Returns 0 if the date is invalid. Returns true if the specified date year, month, and day is valid; otherwise returns false.
Although localized month names can also be used, they depend on the user's locale settings. TextDate , the string is formatted in the default way.
RFC2822Datethe string is formatted in an RFC 2822 compatible way. Uses the system gusto to localize the name, i. The range of dates able to be stored by as a Julian Day number is for technical reasons limited to between -784350574879 and 784354017364, which means from before 2 billion BCE to after 2 billion CE. Like dbrank0 pointed it out. DefaultLocaleLongDatethe u format depends on the default application locale. See also static PySide2. See also, and. Although localized month names can also be used, they depend on the user's locale settings. This restriction may apply to locale-aware formats as well, depending on the tout settings. The behavior for this function is undefined if the datetime stored in this object is not valid. First is the day, then comes the month, and the last is the year. 
Days Calculator: Days Between Two Dates - It is indeed a hassle, but there is a , if you want to do the calculation yourself.
It is a combination of the and classes. It can read the current datetime from the system clock. It provides functions for comparing datetimes and for manipulating a datetime by adding a number of seconds, days, months, or years. A object is typically created either by giving a date and time explicitly in the constructor, or by using the static function that returns a object set to the system clock's time. The date and time can be changed with and. The function returns a , given a string and a date format used to interpret the date within the string. The and functions provide access to the date and time parts of the datetime. The same information is provided in textual format by the function. You can increment or decrement a datetime by a given number of milliseconds using , seconds using , or days using. Similarly you can use and. The function returns the number of days between two datetimes, returns the number of seconds between two datetimes, and returns the number of milliseconds between two datetimes. You can also use to find out if a object stores a UTC time or a local time. Operations such as and are aware of daylight saving time DST. Note: does not account for leap seconds. Use of Gregorian and Julian Calendars uses the Gregorian calendar in all locales, beginning on the date 15 October 1582. For dates up to and including 4 October 1582, the Julian calendar is used. This means there is a 10-day gap in the internal calendar between the 4th and the 15th of October 1582. When you use for dates in that epoch, the day after 4 October 1582 is 15 October 1582, and the dates in the gap are invalid. The Julian to Gregorian changeover date used here is the date when the Gregorian calendar was first introduced, by Pope Gregory XIII. That change was not universally accepted and some localities only executed it at a later date if at all. If an application must support a locale-specific dating system, it must do so on its own, remembering to convert the dates using the Julian day. No Year 0 There is no year 0. Dates in that year are considered invalid. Range of Valid Dates The range of valid dates is from January 2nd, 4713 BCE, to sometime in the year 11 million CE. It is suitable for use in applications that must convert a to a date in another calendar system, e. The Gregorian calendar was introduced in different places around the world on different dates. For dates up to and including 4 October 1582, uses the Julian calendar. This means there is a 10-day gap in the calendar between the 4th and the 15th of October 1582. When you use for dates in that epoch, the day after 4 October 1582 is 15 October 1582, and the dates in the gap are invalid. Use of System Timezone uses the system's time zone information to determine the offset of local time from UTC. If the system is not configured correctly or not up-to-date, will give wrong results as well. Daylight Savings Time DST takes into account the system's time zone information when dealing with DST. On modern Unix systems, this means it applies the correct historical DST data whenever possible. On Windows and Windows CE, where the system doesn't support historical DST data, historical accuracy is not maintained with respect to DST. The range of valid dates taking DST into account is 1970-01-01 to the present, and rules are in place for handling DST correctly until 2037-12-31, but these could change. For dates falling outside that range, makes a best guess using the rules for year 1970 or 2037, but we can't guarantee accuracy. This means doesn't take into account changes in a locale's time zone before 1970, even if the system's time zone database supports that information. See also , , and. Member Function Documentation QDateTime:: QDateTime Constructs a null datetime i. A null datetime is invalid, since the date is invalid. If date is valid and time is not, the time will be set to midnight. QDateTime:: ~QDateTime Destroys the datetime. QDateTime:: addDays int ndays const Returns a object containing a datetime ndays days later than the datetime of this object or earlier if ndays is negative. See also , , , and. QDateTime:: addMSecs msecs const Returns a object containing a datetime msecs miliseconds later than the datetime of this object or earlier if msecs is negative. See also , , , , and. QDateTime:: addMonths int nmonths const Returns a object containing a datetime nmonths months later than the datetime of this object or earlier if nmonths is negative. See also , , , and. QDateTime:: addSecs int s const Returns a object containing a datetime s seconds later than the datetime of this object or earlier if s is negative. See also , , , , and. QDateTime:: addYears int nyears const Returns a object containing a datetime nyears years later than the datetime of this object or earlier if nyears is negative. See also , , , and. See also , , , and. This function was introduced in Qt 4. See also , , , and. This function was introduced in Qt 4. See also , , , and. QDateTime:: date const Returns the date part of the datetime. See also , , and. If the other datetime is earlier than this datetime, the value returned is negative. See also , , and. On systems that do not support time zones, the time will be set as if local time were. Note that there are possible values for msecs that lie outside the valid range of , both negative and positive. The behavior of this function is undefined for those values. This function was introduced in Qt 4. Note for : It is recommended that you use the English short month names e. Although localized month names can also be used, they depend on the user's locale settings. These expressions may be used for the date part of the format string: Expression Output d the day as number without a leading zero 1 to 31 dd the day as number with a leading zero 01 to 31 ddd the abbreviated localized day name e. M the month as number without a leading zero 1-12 MM the month as number with a leading zero 01-12 MMM the abbreviated localized month name e. MMMM the long localized month name e. It is only possible to use the English names if the user's language is English. All other input characters will be treated as text. Any sequence of characters that are enclosed in singlequotes will also be treated as text and not be used as an expression. The expressions that don't have leading zeroes d, M, h, m, s, z will be greedy. See also , , and. On systems that do not support time zones, the time will be set as if local time were. This function was introduced in Qt 4. A null datetime is invalid. See also , , and. If the other datetime is earlier than this datetime, the value returned is negative. Before performing the comparison, the two datetimes are converted to to ensure that the result is correct if one of the two datetimes has daylight saving time DST and the other doesn't. This function was introduced in Qt 4. See also , , and. If the other datetime is earlier than this datetime, the value returned is negative. Before performing the comparison, the two datetimes are converted to to ensure that the result is correct if one of the two datetimes has daylight saving time DST and the other doesn't. If no time is set, it is set to midnight. See also , , and. On systems that do not support time zones this function will behave as if local time were. Note that there are possible values for msecs that lie outside the valid range of , both negative and positive. The behavior of this function is undefined for those values. This function was introduced in Qt 4. See also , , and. See also , , , and. On systems that do not support time zones this function will behave as if local time were. QDateTime:: time const Returns the time part of the datetime. See also , , and. Qt::TimeSpec QDateTime:: timeSpec const Returns the time specification of the datetime. See also , , , and. QDateTime:: toLocalTime const Returns a datetime containing the date and time information in this datetime, but specified using the definition. QDateTime:: toMSecsSinceEpoch const Returns the datetime as the number of milliseconds that have passed since 1970-01-01T00:00:00. On systems that do not support time zones, this function will behave as if local time were. The behavior for this function is undefined if the datetime stored in this object is not valid. However, for all valid dates, this function returns a unique value. This function was introduced in Qt 4. The format parameter determines the format of the result string. These expressions may be used for the date: Expression Output d the day as number without a leading zero 1 to 31 dd the day as number with a leading zero 01 to 31 ddd the abbreviated localized day name e. M the month as number without a leading zero 1-12 MM the month as number with a leading zero 01-12 MMM the abbreviated localized month name e. MMMM the long localized month name e. All other input characters will be ignored. Any sequence of characters that are enclosed in singlequotes will be treated as text and not be used as an expression. Example format strings assumed that the is 21 May 2001 14:13:09 : Format Result dd. Returns the datetime as a string in the format given. If the format is , the string is formatted in the default way. If the is , Z will be appended to the string; if the is the offset in hours and minutes from UTC will be appended to the string. If the format is or , the string format depends on the locale settings of the system. If the format is or , the string format depends on the default application locale. This is the locale set with , or the system locale if no default locale has been set. Identical to calling QLocale. If the datetime is invalid, an empty string will be returned. Warning: The format is only valid for years in the range 0 to 9999. This restriction may apply to locale-aware formats as well, depending on the locale settings. See also , , and. QDateTime:: toTimeSpec Qt::TimeSpec specification const Returns a copy of this datetime configured to use the given time specification. See also , , and. On systems that do not support time zones, this function will behave as if local time were. If the date is outside the range 1970-01-01T00:00:00 to 2106-02-07T06:28:14, this function returns -1 cast to an unsigned integer i. To get an extended range, use. QDateTime:: toUTC const Returns a datetime containing the date and time information in this datetime, but specified using the definition. Two datetimes are different if either the date, the time, or the time zone components are different. © 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. All other trademarks are property of their respective owners.