public void FixedZone_Eastern() { var offset = Offset.FromHours(5); var rules = new List <ZoneRuleSet> { new ZoneRuleSet("GMT-5", offset, Offset.Zero, int.MaxValue, null) }; var zone = DateTimeZoneBuilder.Build("GMT-5", rules); FixedDateTimeZone fixedZone = (FixedDateTimeZone)zone; Assert.AreEqual(offset, fixedZone.Offset); }