The eschatological calendar is an eternal calendar, which starts in the year 1329 and changes generation every 480 years, just like the previous one. From the year of adoption, until shortly after the year 6000, the two calendars coincide. The period of 480 years, and the year 1329, are explained here and here.
The complete Java program is here. The lines
double m0 = T - (5. + n)* K + L + 14.;
and
a = (12 * year + 12 + n)% 19;
and
this(year, ((year - 1329) / 480));
have been changed.
The Qeviyot of the eschatological calendar can be found here, from the year 1329 until the year 7200. During this range of 6000 years, the calendar is quite accurate with respect to the Equinox.
