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Asked: 2026-06-14T22:28:51+00:00

Oracle docs http://docs.oracle.com/javase/6/docs/technotes/guides/intl/calendar.doc.html states that Java supports 3 calendar systems: Gregorian, Japanese Imperial and

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Oracle docs http://docs.oracle.com/javase/6/docs/technotes/guides/intl/calendar.doc.html states that Java supports 3 calendar systems: Gregorian, Japanese Imperial and Thai Buddhist. Does Java support Julian calendar?

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  1. Editorial Team

    Yes, it does.

    From the doc of GregorianCalendar:

    GregorianCalendar is a hybrid calendar that supports both the Julian
    and Gregorian calendar systems with the support of a single
    discontinuity, which corresponds by default to the Gregorian date when
    the Gregorian calendar was instituted (October 15, 1582 in some
    countries, later in others). The cutover date may be changed by the
    caller by calling setGregorianChange().

    Use setGregorianChange to change it.

    public void setGregorianChange(Date date) Sets the GregorianCalendar
    change date. This is the point when the switch from Julian dates to
    Gregorian dates occurred. Default is October 15, 1582 (Gregorian).
    Previous to this, dates will be in the Julian calendar. To obtain a
    pure Julian calendar, set the change date to Date(Long.MAX_VALUE). To
    obtain a pure Gregorian calendar, set the change date to
    Date(Long.MIN_VALUE).

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