The United States observes daylight savings time on March 12, 2020, by moving the clocks forward an hour at 2 a.m. What does the following code output?
LocalDate localDate = LocalDate.of(2020, 3, 12);
LocalTime localTime = LocalTime.of(13, 0);
ZoneId zone = ZoneId.of("America/New_York");
ZonedDateTime z = ZonedDateTime.of(localDate, localTime, zone);
Duration duration = Duration.ofHours(3);
ZonedDateTime later = z.plus(duration);
System.out.println(later.getHour());
B.
Adding three hours to 13:00 makes it 16:00.
While this date happens to be the start of daylight savings time, the change occurs at 2 a.m.
This code uses 13:00, which is 1 p.m.
Since the calculation does not cross 2 a.m., the fact that it is the date that starts daylight savings time is irrelevant.
Option B is correct because the hour is 16 and the time is 16:00.