private DaylightSavingInformation GetDaylightSavingInfo(ZonedDateTime zonedDateTime)
{
if (zonedDateTime.GetZoneInterval().IsoLocalEnd.Year > 10000) return DaylightSavingInformation.CreateWithNoDaylightSavings();
var daylightSavingInfo = new DaylightSavingInformation { IsInDaylightSavingsTime = zonedDateTime.GetZoneInterval().Savings.Milliseconds > 0 };
if (daylightSavingInfo.IsInDaylightSavingsTime)
{
daylightSavingInfo.End = zonedDateTime.GetZoneInterval().IsoLocalEnd;
daylightSavingInfo.EndDateSavingPutBackInMilliseconds = zonedDateTime.GetZoneInterval().Savings.Milliseconds;
daylightSavingInfo.HasEnded = daylightSavingInfo.End.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
daylightSavingInfo.Start = zonedDateTime.GetZoneInterval().IsoLocalStart.Minus(Period.FromMilliseconds(zonedDateTime.GetZoneInterval().Savings.Milliseconds));
daylightSavingInfo.StartDateSavingPutForwardInMilliseconds = zonedDateTime.GetZoneInterval().Savings.Milliseconds;
daylightSavingInfo.HasStarted = daylightSavingInfo.Start.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
}
else
{
var previousZoneInterval = zonedDateTime.GetZoneInterval().Start.Minus(Duration.FromMilliseconds(1)).InZone(zonedDateTime.Zone).GetZoneInterval();
daylightSavingInfo.End = previousZoneInterval.IsoLocalEnd;
daylightSavingInfo.EndDateSavingPutBackInMilliseconds = previousZoneInterval.Savings.Milliseconds;
daylightSavingInfo.HasEnded = daylightSavingInfo.End.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
if (!daylightSavingInfo.NoDaylightSavings)
{
var nextZoneInterval = zonedDateTime.GetZoneInterval().End.Plus(Duration.FromMilliseconds(1)).InZone(zonedDateTime.Zone).GetZoneInterval();
daylightSavingInfo.Start = nextZoneInterval.IsoLocalStart.Minus(Period.FromMilliseconds(nextZoneInterval.Savings.Milliseconds));
daylightSavingInfo.StartDateSavingPutForwardInMilliseconds = nextZoneInterval.Savings.Milliseconds;
daylightSavingInfo.HasStarted = daylightSavingInfo.Start.ToDateTimeUnspecified() < zonedDateTime.LocalDateTime.ToDateTimeUnspecified();
}
}
return daylightSavingInfo;
}
