Change return / Date (1386295200000) / to date format

The best option in this case is inherit the JsonResult class and change the date format setting, as follows:

Class JsonResultDateFormat :

public class JsonResultDateFormat : JsonResult
{        
    public JsonResultDateFormat(object data, 
            JsonRequestBehavior jsonRequestBehavior = JsonRequestBehavior.AllowGet)    
    {
        Data = data;
        JsonRequestBehavior = jsonRequestBehavior;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        HttpResponseBase response = context.HttpContext.Response;
        response.ContentType = "application/json";
        if (ContentEncoding != null) response.ContentEncoding = ContentEncoding;
        JsonTextWriter writer = new JsonTextWriter(response.Output) { 
            Formatting = Formatting.Indented 
        };
        JsonSerializer serializer = JsonSerializer.Create(new JsonSerializerSettings()
        {
            DateFormatString = "dd/MM/yyyy" // aqui o formato da data
        });
        serializer.Serialize(writer, Data);
        writer.Flush();
    }

    public static JsonResultDateFormat Create(object data, 
                JsonRequestBehavior jsonRequestBehavior = JsonRequestBehavior.AllowGet)
        => new JsonResultDateFormat(data, jsonRequestBehavior);
}

and method Controller :

public JsonResult Test()
{
    using (DatabasecoreContext c = new DatabasecoreContext())
    {
        var data = c.Notice.ToList();
        return JsonResultDateFormat.Create(data);
    }
}

Your output is :

[
  {
    "Id": 1,
    "CreditId": 1,
    "Title": "Esporte",
    "DateCreated": "01/02/2018"
  },
  {
    "Id": 2,
    "CreditId": 2,
    "Title": "Esporte",
    "DateCreated": "01/02/2018"
  }
]

Reference Dealing with JSON Dates in ASP.NET MVC

I believe you are making a Json call and have a date field, just like Json below:

{  
   "rows":[  
      {  
         "UsuarioConviteID":1,
         "Email":"[email protected]",
         "Controle":"Aceito",
         "DtControle":"\/Date(1518540878497)\/",
         "DtCad":"\/Date(1518526866667)\/",
         "Status":"A",
         "Fixo":"Não"
      }
   ],
   "total":1
}

For you to convert date using JQuery you can use the function:

function formataData(value) {
    if (value == null)
        return null;    
    var dataTexto = value.replace('/', '').replace('/', '').replace('Date', '').replace('(', '').replace(')', '');
    var date = new Date(parseInt(dataTexto));    
    return pad(2, date.getDate().toString(), '0') + "/" + pad(2, (date.getMonth() + 1).toString(), '0') + "/" + pad(4, date.getFullYear().toString(), '0');
};

The Momentjs library already supports ASP.NET JSON Date , see documentation .

Code sample:

moment("/Date(1386295200000)/").format("DD/MM/YYYY"); // 06/12/2013
moment("/Date(1198908717056-0700)/"); // Sat Dec 29 2007 04:11:57 GMT-0200
moment("/Date(1198908717056-0700)/").format("DD/MM/YYYY"); // 29/12/2007

See the result:

$(function() {
  var result = moment('/Date(1386295200000)/').format("DD/MM/YYYY");
  alert(result);
  result = moment("/Date(1198908717056-0700)/");
  alert(result);
  result = moment("/Date(1198908717056-0700)/").format("DD/MM/YYYY");
  alert(result);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><scriptsrc="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.11.1/moment.min.js"></script>

Or if you prefer in JSFiddle .

On the server side, the date is probably correct. Usually this happens in the conversion from DateTime to Json (and we usually treat the return in JavaScript , I do not know if it's your case, the question does not address this).

If you want to make the adjustment only on the front-end side via javascript, create a function like this:

function ConverterJsonDateToJavascriptDate(data)
{
    var retorno = new Date(parseInt(jsonDate.substr(6)));
}

Use this:

var jsonDate = "/Date(1386295200000)/"; 
var resultado = ConverterJsonDateToJavascriptDate(jsonDate);

I recommend using the MomentJS framework to handle dates. Here's an example from the Bootgrid documentation.

$("#grid").bootgrid({
    converters: {
        datetime: {
            from: function (value) { return moment(value); },
            to: function (value) { return value.format("lll"); }
        }
    }
});

Another alternative is to check the date output, using JsonProperty annotation:

using System;
using System.Web.Http;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

namespace WebApiDemo.Controllers
{
    public class ValuesController : ApiController
    {
        // GET api/values
        public IHttpActionResult Get()
        {
            var demo = new DemoViewModel { Data = DateTime.UtcNow };
            return Ok(demo);
        }
    }

    public class DemoViewModel
    {
        [JsonProperty(ItemConverterType = typeof(IsoDateTimeConverter))]
        public DateTime Data { get; set; }
    }
}