Class CopticChronology

java.lang.Object
javax.time.calendar.Chronology
javax.time.i18n.CopticChronology
All Implemented Interfaces:
Serializable, Calendrical
public final class CopticChronology extends Chronology implements Serializable
The Coptic calendar system.

CopticChronology defines the rules of the Coptic calendar system. The Coptic calendar has twelve months of 30 days followed by an additional period of 5 or 6 days, modelled as the thirteenth month in this implementation.

Years are measured in the 'Era of the Martyrs'. 0001-01-01 (Coptic) equals 0284-08-29 (ISO). The supported range is from Coptic year 1 to year 9999 (inclusive).

CopticChronology is immutable and thread-safe.

Author:
Stephen Colebourne
See Also:

  • Field Details

    • INSTANCE

      public static final CopticChronology INSTANCE
      The singleton instance of CopticChronology.

  • Method Details

    • isLeapYear

      public static boolean isLeapYear(int year)
      Checks if the specified year is a leap year.

      A year is leap if the remainder after division by four equals three. This method does not validate the year passed in, and only has a well-defined result for years in the supported range.

      Parameters:
      year - the year to check, not validated for range
      Returns:
      true if the year is a leap year

    • getName

      public String getName()
      Gets the name of the chronology.
      Specified by:
      getName in class Chronology
      Returns:
      the name of the chronology, never null

    • yearRule

      public static DateTimeFieldRule<Integer> yearRule()
      Gets the rule for the year field in the Coptic chronology.
      Returns:
      the rule for the year field, never null

    • monthOfYearRule

      public static DateTimeFieldRule<Integer> monthOfYearRule()
      Gets the rule for the month-of-year field in the Coptic chronology.
      Returns:
      the rule for the month-of-year field, never null

    • dayOfMonthRule

      public static DateTimeFieldRule<Integer> dayOfMonthRule()
      Gets the rule for the day-of-month field in the Coptic chronology.
      Returns:
      the rule for the day-of-month field, never null

    • dayOfYearRule

      public static DateTimeFieldRule<Integer> dayOfYearRule()
      Gets the rule for the day-of-year field in the Coptic chronology.
      Returns:
      the rule for the day-of-year field, never null

    • dayOfWeekRule

      public static DateTimeFieldRule<DayOfWeek> dayOfWeekRule()
      Gets the rule for the day-of-week field in the Coptic chronology.
      Returns:
      the rule for the day-of-week field, never null

    • periodYears

      public static PeriodUnit periodYears()
      Gets the period unit for years.

      The period unit defines the concept of a period of a year. This has an estimated duration equal to 365.25 days.

      See yearRule() for the main date-time field.

      Returns:
      the period unit for years, never null

    • periodMonths

      public static PeriodUnit periodMonths()
      Gets the period unit for months.

      The period unit defines the concept of a period of a month. Coptic months are typically 30 days long, except for the 13th month which is 5 or 6 days long. The rule uses an estimated duration of 29.5 days.

      See monthOfYearRule() for the main date-time field.

      Returns:
      the period unit for months, never null

    • periodWeeks

      public static PeriodUnit periodWeeks()
      Gets the period unit for weeks.

      The period unit defines the concept of a period of a week. This is equivalent to the ISO weeks period unit.

      Returns:
      the period unit for weeks, never null

    • periodDays

      public static PeriodUnit periodDays()
      Gets the period unit for days.

      The period unit defines the concept of a period of a day. This is equivalent to the ISO days period unit.

      See dayOfMonthRule() for the main date-time field.

      Returns:
      the period unit for days, never null