ZoneRules test = europeLondon();
ZonedDateTime old = createZDT(1800, 1, 1, ZoneOffset.UTC);
Instant instant = old.toInstant();
ZoneOffset offset = ZoneOffset.ofHoursMinutesSeconds(0, -1, -15);
assertEquals(test.getOffset(instant), offset);
checkOffset(test, old.toLocalDateTime(), offset, 1);
assertEquals(test.getStandardOffset(instant), offset);
assertEquals(test.getDaylightSavings(instant), Duration.ZERO);
assertEquals(test.isDaylightSavings(instant), false);
}