Gregorian class

Gregorian (Miladi or Milaadi) date class

Date objects are required to be immutable

Dates should be uniquely specified by year, month and day Or by using julian day number

Date objects are valid dates once constructed, It should throw exception when there is a validity or calculation problem

For example constructing date with day being out of month length or date being out of computable region throws DateException

Implemented types

Constructors

Gregorian(int year, [int month = 1, int day = 1, int hour = 0, int minute = 0, int second = 0]): Create a Gregorian date by using year, month and day
Gregorian.fromDateTime(DateTime dateTime): Create a Gregorian date by using DateTime object
factory
Gregorian.fromJalali(Jalali date): Create a Gregorian date from Jalali date
factory
Gregorian.fromJulianDayNumber(int julianDayNumber): Calculates Gregorian and Julian calendar dates from the Julian Day number julianDayNumber for the period since jdn=-34839655 (i.e. the year -100100 of both calendars) to some millions years ahead of the present.
factory
Gregorian.now(): Get Gregorian date for now
factory

day → int: Gregorian day of the month (1 to 28/29/30/31)
final
formatter → GregorianFormatter: Formatter for this date object
no setteroverride
hashCode → int: hashcode operator
no setteroverride
hour → int: Hour
final
julianDayNumber → int: Calculates the Julian Day number from Gregorian or Julian calendar dates. This integer number corresponds to the noon of the date (i.e. 12 hours of Universal Time).
no setteroverride
minute → int: Minute
final
month → int: Gregorian month (1 to 12)
final
monthLength → int: Computes number of days in a given month in a Gregorian year.
no setteroverride
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
second → int: second
final
weekDay → int: Week day number monday = 1 sunday = 7
no setteroverride
year → int: Gregorian year (years BC numbered 0, -1, -2, ...)
final

add({int years = 0, int months = 0, int days = 0}) → Gregorian: makes a new date instance and add days, months and years separately
override
addDays(int days) → Gregorian: makes a new date object with added days to this date
override
addMonths(int months) → Gregorian: Makes a new date object with added months to this date
override
addYears(int years) → Gregorian: Makes a new date object with added years to this date
override
compareTo(Gregorian other) → int: Compare dates
override
copy({int? year, int? month, int? day, int? hour, int? minute, int? second}) → Gregorian: Copy this date object with some fields changed
override
isLeapYear() → bool: Checks if a year is a leap year or not.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDateTime() → DateTime: Converts Gregorian date to DateTime object
override
toJalali() → Jalali: Converts a Gregorian date to Jalali.
toString() → String: Default string representation: Gregorian(YYYY, MM, DD). use formatter for custom formatting.
override
withDay(int day) → Gregorian: Make a new date object with changed day
override
withMonth(int month) → Gregorian: Make a new date object with changed month
override
withYear(int year) → Gregorian: Make a new date object with changed year
override