Implements a pure International Fixed calendar (also known as the Cotsworth plan, the Eastman plan, the 13 Month calendar or the Equal Month calendar) a solar calendar proposal for calendar reform designed by Moses B. Cotsworth, who presented it in 1902.
It provides for a year of 13 months of 28 days each. Month 6 has 29 days in a leap year, but the additional day is not part of any week. Month 12 always has 29 days, but the additional day is not part of any week. It is therefore a perennial calendar, with every date fixed always on the same weekday. Though it was never officially adopted in any country, it was the official calendar of the Eastman Kodak Company from 1928 to 1989.
This date operates using the International fixed calendar.
This calendar system is a proposed reform calendar system, and is not in common use.
The International fixed differs from the Gregorian in terms of month count and length, and the leap year rule.
Dates are aligned such that 0001/01/01 (International fixed) is 0001-01-01 (ISO).
More information is available in the International Fixed Calendar Wikipedia article.
This class must be treated as a value type. Do not synchronize, rely on the identity hash code or use the distinction between equals() and ==.
| Modifier and Type | Field and Description |
|---|---|
| private final int | day
The day of the month. |
| private final transient int | dayOfYear
The day of year. |
| private final transient boolean | isLeapDay
Is the day-of-year a Leap Day ? |
| private final transient boolean | isLeapYear
Is the proleptic year a Leap year ? |
| private final transient boolean | isYearDay
Is the day-of-year a Year Day ? |
| private static final int | LEAP_DAY_AS_DAY_OF_YEAR
Leap Day as day-of-year |
| private final int | month
The month of the year. |
| private final int | prolepticYear
The proleptic year. |
| private static final long | serialVersionUID
Serialization version. |
| Access | Constructor and Description |
|---|---|
| private | InternationalFixedDate(int
the International fixed proleptic-year prolepticYear, int the International fixed month, from 1 to 13 month, int the International fixed day-of-month, from 1 to 28 (29 for Leap Day or Year Day) dayOfMonth)Creates an instance from validated data. |
| Modifier and Type | Method and Description |
|---|---|
| public ChronoLocalDateTime | atTime(LocalTime
the local time to use, not null localTime)Overrides default java. Combines this date with a time to create a |
| pack-priv static InternationalFixedDate | Returns: the International fixed datethe International fixed proleptic-year prolepticYear, int the International fixed month, from 1 to 13 month, int the International fixed day-of-month, from 1 to 28 (29 for Leap Day or Year Day) dayOfMonth)Factory method, validates the given triplet year, month and dayOfMonth. |
| public static InternationalFixedDate | Returns: the date in the International fixed calendar system, not nullthe temporal object to convert, not null temporal)Hides java. Obtains a |
| pack-priv int | |
| pack-priv int | |
| pack-priv int | |
| pack-priv int | |
| public InternationalFixedChronology | Returns: the International fixed chronology, not nullImplements java. Gets the chronology of this date, which is the International fixed calendar system. |
| pack-priv int | |
| pack-priv int | Returns: the day of the week: between 1 and 7, or 0 (Leap Day, Year Day)Overrides org. Returns the day of the week represented by this date. |
| pack-priv int | |
| public InternationalFixedEra | Returns: the era applicable at this date, not nullOverrides default java. Gets the era applicable at this date. |
| private int | Returns: int day of the year for calculationsFor calculation purposes in a leap year, decrement the day of the year for months 7 and higher - including Year Day. |
| pack-priv int | |
| pack-priv long | |
| pack-priv int | |
| private boolean | |
| private boolean | |
| public int | Returns: the length of the month in daysImplements java. Returns the length of the month represented by this date. |
| public int | Returns: the length of the year in days: 365 or 366Overrides default java. Returns the length of the year represented by this date. |
| pack-priv int | |
| public InternationalFixedDate | minus(TemporalAmount
the amount to subtract, not null amount)Overrides default java. Returns an object of the same type as this object with an amount subtracted. |
| public InternationalFixedDate | minus(long
the amount of the specified unit to subtract, may be negative amountToSubtract, TemporalUnit the unit of the amount to subtract, not null unit)Overrides default java. Returns an object of the same type as this object with the specified period subtracted. |
| pack-priv long | |
| public static InternationalFixedDate | Returns: the current date using the system clock and default time-zone, not nullObtains the current |
| public static InternationalFixedDate | |
| public static InternationalFixedDate | |
| public static InternationalFixedDate | Returns: the date in International fixed calendar system, not nullthe International fixed proleptic-year prolepticYear, int the International fixed month-of-year, from 1 to 13 month, int the International fixed day-of-month, from 1 to 28 (29 for Leap Day or Year Day) dayOfMonth)Obtains a |
| pack-priv static InternationalFixedDate | Returns: the date in International fixed calendar system, not nullthe epoch day to convert based on 1970-01-01 (ISO) epochDay)Obtains a |
| pack-priv static InternationalFixedDate | Returns: the date in International fixed calendar system, not nullthe International fixed proleptic-year prolepticYear, int the International fixed day-of-year, from 1 to 366 dayOfYear)Obtains a |
| public InternationalFixedDate | plus(TemporalAmount
the amount to add, not null amount)Overrides default java. Returns an object of the same type as this object with an amount added. |
| public InternationalFixedDate | plus(long
the amount of the specified unit to add, may be negative amountToAdd, TemporalUnit the unit of the amount to add, not null unit)Overrides org. Overrides default java. Returns an object of the same type as this object with the specified period added. |
| pack-priv InternationalFixedDate | |
| pack-priv InternationalFixedDate | |
| pack-priv InternationalFixedDate | |
| public ValueRange | range(TemporalField
the field to query the range for, not null field)Overrides org. Overrides default java. Gets the range of valid values for the specified field. |
| pack-priv ValueRange | rangeAlignedWeekOfMonth()
Implements abstract org.
|
| private Object | |
| pack-priv InternationalFixedDate | resolvePrevious(int newYear, int newMonth, int dayOfMonth)
Implements abstract org.
|
| private static InternationalFixedDate | Returns: the resolved datethe International fixed proleptic-year prolepticYear, int the International fixed month, from 1 to 13 month, int the International fixed day-of-month, from 1 to 28 (29 for Leap Day or Year Day) day)Consistency check for dates manipulations after calls to
|
| public long | toEpochDay()
Overrides default java. Converts this date to the Epoch Day. |
| public String | Returns: the string representationOverrides org. Implements java. Display the date in human-readable format. |
| public long | until(Temporal
the end date, exclusive, which is converted to a
endExclusive, TemporalUnit ChronoLocalDate in the same chronology, not nullthe unit to measure the amount in, not null unit)Implements java. Calculates the amount of time until another date in terms of the specified unit. |
| public ChronoPeriod | until(ChronoLocalDate
the end date, exclusive, which may be in any chronology, not null endDateExclusive)Implements java. Calculates the period between this date and another date as a |
| pack-priv long | |
| public InternationalFixedDate | with(TemporalAdjuster
the adjuster to use, not null adjuster)Overrides default java. Returns an adjusted object of the same type as this object with the adjustment made. |
| public InternationalFixedDate | with(TemporalField
the field to set in the result, not null field, long the new value of the field in the result newValue)Overrides org. Overrides default java. Returns an object of the same type as this object with the specified field altered. |
| pack-priv InternationalFixedDate | |
| pack-priv long | Returns: The number of years from this date to the given day.The end date. end)Get the number of years from this date to the given day. |
| day | back to summary |
|---|---|
| private final int day The day of the month. | |
| dayOfYear | back to summary |
|---|---|
| private final transient int dayOfYear The day of year. | |
| isLeapDay | back to summary |
|---|---|
| private final transient boolean isLeapDay Is the day-of-year a Leap Day ? | |
| isLeapYear | back to summary |
|---|---|
| private final transient boolean isLeapYear Is the proleptic year a Leap year ? | |
| isYearDay | back to summary |
|---|---|
| private final transient boolean isYearDay Is the day-of-year a Year Day ? | |
| LEAP_DAY_AS_DAY_OF_YEAR | back to summary |
|---|---|
| private static final int LEAP_DAY_AS_DAY_OF_YEAR Leap Day as day-of-year | |
| month | back to summary |
|---|---|
| private final int month The month of the year. | |
| prolepticYear | back to summary |
|---|---|
| private final int prolepticYear The proleptic year. | |
| serialVersionUID | back to summary |
|---|---|
| private static final long serialVersionUID Serialization version. | |
| InternationalFixedDate | back to summary |
|---|---|
| private InternationalFixedDate(int prolepticYear, int month, int dayOfMonth) Creates an instance from validated data.
| |
| atTime | back to summary |
|---|---|
| public ChronoLocalDateTime Overrides default java. Doc from java. Combines this date with a time to create a
This returns a
| |
| create | back to summary |
|---|---|
| pack-priv static InternationalFixedDate create(int prolepticYear, int month, int dayOfMonth) Factory method, validates the given triplet year, month and dayOfMonth.
| |
| from | back to summary |
|---|---|
| public static InternationalFixedDate from(TemporalAccessor temporal) Hides java. Obtains a
This obtains a date in the International fixed calendar system based on the specified temporal.
A
The conversion typically uses the
This method matches the signature of the functional interface
| |
| getAlignedDayOfWeekInMonth | back to summary |
|---|---|
| pack-priv int getAlignedDayOfWeekInMonth() Overrides org.
| |
| getAlignedDayOfWeekInYear | back to summary |
|---|---|
| pack-priv int getAlignedDayOfWeekInYear() Overrides org.
| |
| getAlignedWeekOfMonth | back to summary |
|---|---|
| pack-priv int getAlignedWeekOfMonth() Overrides org.
| |
| getAlignedWeekOfYear | back to summary |
|---|---|
| pack-priv int getAlignedWeekOfYear() Overrides org.
| |
| getChronology | back to summary |
|---|---|
| public InternationalFixedChronology getChronology() Implements java. Gets the chronology of this date, which is the International fixed calendar system.
The
| |
| getDayOfMonth | back to summary |
|---|---|
| pack-priv int getDayOfMonth() Implements abstract org.
| |
| getDayOfWeek | back to summary |
|---|---|
| pack-priv int getDayOfWeek() Overrides org. Returns the day of the week represented by this date. Leap Day and Year Day are not considered week-days, thus return 0.
| |
| getDayOfYear | back to summary |
|---|---|
| pack-priv int getDayOfYear() Implements abstract org.
| |
| getEra | back to summary |
|---|---|
| public InternationalFixedEra getEra() Overrides default java. Gets the era applicable at this date.
The International fixed calendar system only has one era, 'CE',
defined by
| |
| getInternalDayOfYear | back to summary |
|---|---|
| private int getInternalDayOfYear() For calculation purposes in a leap year, decrement the day of the year for months 7 and higher - including Year Day. Leave out Leap Day though!
| |
| getMonth | back to summary |
|---|---|
| pack-priv int getMonth() Implements abstract org.
| |
| getProlepticWeek | back to summary |
|---|---|
| pack-priv long getProlepticWeek() | |
| getProlepticYear | back to summary |
|---|---|
| pack-priv int getProlepticYear() Implements abstract org.
| |
| isLongMonth | back to summary |
|---|---|
| private boolean isLongMonth() | |
| isSpecialDay | back to summary |
|---|---|
| private boolean isSpecialDay() | |
| lengthOfMonth | back to summary |
|---|---|
| public int lengthOfMonth() Implements java. Returns the length of the month represented by this date. This returns the length of the month in days. Month lengths do not match those of the ISO calendar system. Months have 28 days, except June which has 29 in leap years and December (month 13) which always has 29 days.
| |
| lengthOfYear | back to summary |
|---|---|
| public int lengthOfYear() Overrides default java. Returns the length of the year represented by this date. This returns the length of the year in days. Year lengths match those of the ISO calendar system.
| |
| lengthOfYearInMonths | back to summary |
|---|---|
| pack-priv int lengthOfYearInMonths() Overrides org.
| |
| minus | back to summary |
|---|---|
| public InternationalFixedDate minus(TemporalAmount amount) Overrides default java. Doc from java. Returns an object of the same type as this object with an amount subtracted.
This adjusts this temporal, subtracting according to the rules of the specified amount.
The amount is typically a Some example code indicating how and why this method is used: date = date.minus(period); // subtract a Period instance date = date.minus(duration); // subtract a Duration instance date = date.minus(workingDays(6)); // example user-written workingDays method
Note that calling
| |
| minus | back to summary |
|---|---|
| public InternationalFixedDate minus(long amountToSubtract, TemporalUnit unit) Overrides default java. Doc from java. Returns an object of the same type as this object with the specified period subtracted.
This method returns a new object based on this one with the specified period subtracted.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st March, then subtracting one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| monthsUntil | back to summary |
|---|---|
| pack-priv long monthsUntil(AbstractDate end) Overrides org.
| |
| now | back to summary |
|---|---|
| public static InternationalFixedDate now() Obtains the current
This will query the Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
| |
| now | back to summary |
|---|---|
| public static InternationalFixedDate now(ZoneId zone) Obtains the current
This will query the Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
| |
| now | back to summary |
|---|---|
| public static InternationalFixedDate now(Clock clock) Obtains the current This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using dependency injection.
| |
| of | back to summary |
|---|---|
| public static InternationalFixedDate of(int prolepticYear, int month, int dayOfMonth) Obtains a
This returns a
| |
| ofEpochDay | back to summary |
|---|---|
| pack-priv static InternationalFixedDate ofEpochDay(long epochDay) Obtains a
| |
| ofYearDay | back to summary |
|---|---|
| pack-priv static InternationalFixedDate ofYearDay(int prolepticYear, int dayOfYear) Obtains a
This returns a
| |
| plus | back to summary |
|---|---|
| public InternationalFixedDate plus(TemporalAmount amount) Overrides default java. Doc from java. Returns an object of the same type as this object with an amount added.
This adjusts this temporal, adding according to the rules of the specified amount.
The amount is typically a Some example code indicating how and why this method is used: date = date.plus(period); // add a Period instance date = date.plus(duration); // add a Duration instance date = date.plus(workingDays(6)); // example user-written workingDays method
Note that calling
| |
| plus | back to summary |
|---|---|
| public InternationalFixedDate plus(long amountToAdd, TemporalUnit unit) Overrides org. Overrides default java. Doc from java. Returns an object of the same type as this object with the specified period added.
This method returns a new object based on this one with the specified period added.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then adding one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| plusMonths | back to summary |
|---|---|
| pack-priv InternationalFixedDate plusMonths(long months) Overrides org.
| |
| plusWeeks | back to summary |
|---|---|
| pack-priv InternationalFixedDate plusWeeks(long weeks) Overrides org.
| |
| plusYears | back to summary |
|---|---|
| pack-priv InternationalFixedDate plusYears(long yearsToAdd) Overrides org.
| |
| range | back to summary |
|---|---|
| public ValueRange range(TemporalField field) Overrides org. Overrides default java. Doc from java. Gets the range of valid values for the specified field.
All fields can be expressed as a Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.
| |
| rangeAlignedWeekOfMonth | back to summary |
|---|---|
| pack-priv ValueRange rangeAlignedWeekOfMonth() Implements abstract org.
| |
| readResolve | back to summary |
|---|---|
| private Object readResolve() Validates the object.
| |
| resolvePrevious | back to summary |
|---|---|
| pack-priv InternationalFixedDate resolvePrevious(int newYear, int newMonth, int dayOfMonth) Implements abstract org.
| |
| resolvePreviousValid | back to summary |
|---|---|
| private static InternationalFixedDate resolvePreviousValid(int prolepticYear, int month, int day) Consistency check for dates manipulations after calls to
| |
| toEpochDay | back to summary |
|---|---|
| public long toEpochDay() Overrides default java. Doc from java. Converts this date to the Epoch Day.
The
This default implementation queries the
| |
| toString | back to summary |
|---|---|
| public String toString() Overrides org. Implements java. Display the date in human-readable format. | |
| until | back to summary |
|---|---|
| public long until(Temporal endExclusive, TemporalUnit unit) Implements java. Doc from java. Calculates the amount of time until another date in terms of the specified unit.
This calculates the amount of time between two
There are two equivalent ways of using this method.
The first is to invoke this method.
The second is to use // these two lines are equivalent amount = start.until(end, MONTHS); amount = MONTHS.between(start, end);The choice should be made based on which makes the code more readable.
The calculation is implemented in this method for
If the unit is not a This instance is immutable and unaffected by this method call.
| |
| until | back to summary |
|---|---|
| public ChronoPeriod until(ChronoLocalDate endDateExclusive) Implements java. Doc from java. Calculates the period between this date and another date as a
This calculates the period between two dates. All supplied chronologies
calculate the period using years, months and days, however the
The start and end points are The calculation is performed using the chronology of this date. If necessary, the input date will be converted to match. This instance is immutable and unaffected by this method call.
| |
| weeksUntil | back to summary |
|---|---|
| pack-priv long weeksUntil(AbstractDate end) Overrides org.
| |
| with | back to summary |
|---|---|
| public InternationalFixedDate with(TemporalAdjuster adjuster) Overrides default java. Doc from java. Returns an adjusted object of the same type as this object with the adjustment made.
This adjusts this date-time according to the rules of the specified adjuster.
A simple adjuster might simply set the one of the fields, such as the year field.
A more complex adjuster might set the date to the last day of the month.
A selection of common adjustments is provided in
Some example code indicating how and why this method is used: date = date.with(Month.JULY); // most key classes implement TemporalAdjuster date = date.with(lastDayOfMonth()); // static import from Adjusters date = date.with(next(WEDNESDAY)); // static import from Adjusters and DayOfWeek
| |
| with | back to summary |
|---|---|
| public InternationalFixedDate with(TemporalField field, long newValue) Overrides org. Overrides default java. Doc from java. Returns an object of the same type as this object with the specified field altered.
This returns a new object based on this one with the value for the specified field changed.
For example, on a In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then changing the month to February would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
| |
| withDayOfYear | back to summary |
|---|---|
| pack-priv InternationalFixedDate withDayOfYear(int value) Overrides org.
| |
| yearsUntil | back to summary |
|---|---|
| pack-priv long yearsUntil(InternationalFixedDate end) Get the number of years from this date to the given day.
| |