The JSON Date format can be converted to a normal date format using a simple statement.

var date=newDate(parseInt(dateInJasonFormat.substr(6)));

where,
The parseInt () function will parse the date string -> dateInJasonFormat.
The substr function takes the lenght as 6 ie it ignores the initial 6 characters which include /Date(. (From the above date format).
Also, you can remove the additional information from the result by just replacing the additional GMT information.

var finalDate= date.toString().replace(/GMT.+/, "");

Now you can check the finalDate in alert box and you’ll get the date in the date format.