public void IsDaylightSavingTime()
{
// Europe/Dublin transitions from UTC+1 to UTC+0 at 2am (local) on 2017-10-29
var dt = new LocalDateTime(2017, 10, 29, 1, 45, 0);
DateTimeZone dublin = DateTimeZoneProviders.Tzdb["Europe/Dublin"];
ZonedDateTime beforeTransition = new ZonedDateTime(dt, dublin, Offset.FromHours(1));
Assert.AreEqual(true, Snippet.For(beforeTransition.IsDaylightSavingTime()));
// Same local time, different offset - so a different instant, after the transition.
ZonedDateTime afterTransition = new ZonedDateTime(dt, dublin, Offset.FromHours(0));
Assert.AreEqual(false, Snippet.For(afterTransition.IsDaylightSavingTime()));
}
public void IsDaylightSavingTime()
{
// Europe/Dublin transitions from UTC+1 to UTC+0 at 2am (local) on 2017-10-29
// However, Euopre/Dublin is also odd in terms of having its standard time as *summer* time,
// and its winter time as "daylight saving time". The saving offset in winter is -1 hour,
// as opposed to the more common "+1 hour in summer".
var dt = new LocalDateTime(2017, 10, 29, 1, 45, 0);
DateTimeZone dublin = DateTimeZoneProviders.Tzdb["Europe/Dublin"];
ZonedDateTime beforeTransition = new ZonedDateTime(dt, dublin, Offset.FromHours(1));
Assert.AreEqual(false, Snippet.For(beforeTransition.IsDaylightSavingTime()));
// Same local time, different offset - so a different instant, after the transition.
ZonedDateTime afterTransition = new ZonedDateTime(dt, dublin, Offset.FromHours(0));
Assert.AreEqual(true, Snippet.For(afterTransition.IsDaylightSavingTime()));
}
