The default datetime value passed to the service changed

ServiceStack.Text
1 
 public partial class HLGL_FORM_HLCXZLGJ_Request
        : IReturn<List<HLGL_FORM_HLCXZLGJ_ViewModel>>
    {
        public virtual string zjid { get; set; }
        public virtual string ksid { get; set; }
        public virtual DateTime StartDate { get; set; }
        public virtual DateTime EndDate { get; set; }
        public virtual string XMND { get; set; }
    }

public async Task<List<HLGL_FORM_HLCXZLGJ_ViewModel>> Any(HLGL_FORM_HLCXZLGJ_Request request)
        {
            var startDate = request.StartDate.Sql();
            var endDate = request.EndDate.AddDays(1).Sql();
            var sql = $@"... ";
            if (request.StartDate == default)
            {
                logger.Info("StartDate is Default");
            }
            else
            {
                logger.Info("StartDate: " + request.StartDate.ToString());
            }
            if (request.EndDate == default)
            {
                logger.Info(" EndDate is Default");
            }
            else
            {
                logger.Info(" EndDate : " + request.EndDate.ToString() ");
            }

Call the service, In the below, request.StartDate is default and the value is 0001/01/01 ,
Ｂut In the above code , the StartDate and EndDate Not equal default, the value is
0001/1/1 8:00:00 , why the value will change? I have try set ServiceStack.Text.JsConfig.SkipDateTimeConversion = true; , it not take effect

var Gateway = app.Gateway;
                var request = new HLGL_FORM_HLCXZLGJ_Request
                {
                    zjid = ZJID,
                    StartDate =default,
                    EndDate =default,
                };
                if(request.StartDate == default)
                {
                    ShowMessage("default StartDate");
                }
                if (request.EndDate == default)
                {
                    ShowMessage("default EndDate");
                }
                var list = Gateway.Send(request);
2

The difference is the TimeZone which isn’t serialized with DateTime’s. Are the TimeZone’s between you’re serializing/deserializing the same?

The way to ensure consistent dates between different timezones is to send UTC dates, in which case you can tell ServiceStack.Text to always assume UTC with:

JsConfig.AssumeUtc = true;
3

I didn’t set the timezone in serializing/deserializing, after set

JsConfig.AssumeUtc = true;

, It works right, thanks!