cal.set(2000, 1, 1);
Instant begining2 = new DefaultInstant(new DefaultPosition(cal.getTime()));
cal.set(2012, 1, 1);
Instant ending2 = new DefaultInstant(new DefaultPosition(cal.getTime()));
Period epochOfUse1 = new DefaultPeriod(begining1, ending1);
Period epochOfUse2 = new DefaultPeriod(begining2, ending2);
calendarEra1 = new DefaultCalendarEra(new SimpleInternationalString("Cenozoic"),
new SimpleInternationalString("no description"),
referenceDate1, julianReference, epochOfUse1);
calendarEra2 = new DefaultCalendarEra(new SimpleInternationalString("Mesozoic"),