javascript check if date object

var myDate=new Date();
if(myDate instanceof Date){
    //im a hot Date
}//checks if is object, null val returns false
function isObject(val) {
    if (val === null) { return false;}
    return ( (typeof val === 'function') || (typeof val === 'object') );
}
var person = {"name":"Boby Snark"};
isObject(person);//truelet date1 = new Date();
let date2 = new Date("random string");

(Object.prototype.toString.call(date1) === '[object Date]' && date1 != "Invalid Date") // true
(Object.prototype.toString.call(date2) === '[object Date]' && date2 != "Invalid Date") // false