Program
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
public class DateToGregorianCal {
public static void main(String[] args) {
Date date = new Date();
System.out.println("Java Date & Time:" + date);
GregorianCalendar gc = new GregorianCalendar ();
System.out.println("Gregorian Date :" + gc.getTime());
System.out.println("Gregorian year :" + gc.get(Calendar.YEAR));
System.out.println("Gregorian Minute :" + gc.get(Calendar.MINUTE));
}
}Output
Java Date & Time:Mon Apr 12 11:47:32 IST 2021 Gregorian Date :Mon Apr 12 11:47:32 IST 2021 Gregorian year :2021 Gregorian Minute :47
Description
public class GregorianCalendar
extends Calendar
GregorianCalendar is a concrete subclass of Calendar and provides the standard calendar
the system used by most of the world.
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().
Historically, in those countries which adopted the Gregorian calendar first, October 4, 1582 (Julian) was
thus followed by October 15, 1582 (Gregorian). This calendar models this correctly. Before the Gregorian cutover,
GregorianCalendar implements the Julian calendar. The only difference between the Gregorian and the Julian calendar
is the leap year rule. The Julian calendar specifies leap years every four years, whereas the Gregorian calendar omits
century years which are not divisible by 400.
GregorianCalendar implements proleptic Gregorian and Julian calendars. That is, dates are computed by extrapolating the
current rules indefinitely far backward and forward in time. As a result, GregorianCalendar may be used for all years to
generate meaningful and consistent results. However, dates obtained using GregorianCalendar are historically accurate only
from March 1, 4 AD onward, when modern Julian calendar rules were adopted. Before this date, leap year rules were applied
irregularly, and before 45 BC the Julian calendar did not even exist.
Prior to the institution of the Gregorian calendar, New Year’s Day was March 25. To avoid confusion, this calendar always
uses January 1. A manual adjustment may be made if desired for dates that are prior to the Gregorian changeover and which
fall between January 1 and March 24.
