using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

using System.Globalization;

​

public class Program

{

    public static void Main()

    {

        var request = @"{""start"":""2018-11-18T18:00:00Z"",""end"":""2018-11-19T03:00:00Z""}";

        var deserialised = JsonConvert.DeserializeObject<ApiRequest>(request);

        Console.WriteLine("Start: {0}, End: {1}", deserialised.Start, deserialised.End);

    }

​

    public class DateFormatConverter : IsoDateTimeConverter

    {

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

        {

            DateTimeStyles = DateTimeStyles.AdjustToUniversal;

            base.WriteJson(writer, value, serializer);

        }

​

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue,

            JsonSerializer serializer)

        {

            var utcDateTime = DateTime.Parse(reader.Value.ToString());

            var tz = CreateAestTimeZone();

            return (DateTimeOffset) TimeZoneInfo.ConvertTimeFromUtc(utcDateTime, tz);

        }

​

        private TimeZoneInfo CreateAestTimeZone()

        {

            // Define transition times to/from DST

            TimeZoneInfo.TransitionTime startTransition, endTransition;

            startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0),

                4, 1, DayOfWeek.Sunday);

            endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0),

                10, 1, DayOfWeek.Sunday);

            // Define adjustment rule

            TimeSpan delta = new TimeSpan(1, 0, 0);

            TimeZoneInfo.AdjustmentRule adjustment;

            adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1999, 10, 1),

                DateTime.MaxValue.Date, delta, startTransition, endTransition);

            // Create array for adjustment rules

            TimeZoneInfo.AdjustmentRule[] adjustments = {adjustment};

            // Define other custom time zone arguments

            string displayName = "(GMT+10:00) Australia/Sydney";

            string standardName = "Australian Eastern Standard Time";

            string daylightName = "Australian Eastern Daylight Time";

            TimeSpan offset = new TimeSpan(11, 0, 0);

            TimeZoneInfo aest = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName,

                daylightName, adjustments);

            return aest;

        }

    }

​

    public class ApiRequest

    {

        [JsonProperty("start")]

        [JsonConverter(typeof (DateFormatConverter))]

        public DateTimeOffset Start

        {

            get;

            set;

        }

​

        [JsonProperty("end")]

        [JsonConverter(typeof (DateFormatConverter))]

        public DateTimeOffset End

        {

            get;

            set;

        }

    }

}