Json Callback

test.php

// inside the .php file
	{
	//$mail = $_POST['mail'];
	$date = $_POST['date'];
    $success = true;
	$response = json_encode(
			array( 'success' => $success,
				'mail' => 'mail',
				'message' => 'test',
				'date' => $date
			) );

	// response output
	header( "Content-Type: application/json" );
	echo $response;
	exit;
}

// working js
$.post(PrayAjax.ajaxurl, {
				action: "pray-date",
			//nonce: WishAjaxRmSl.nonce,
			//id: wlid
        
			}, function(data) { 
				alert(data);
        
			});


// not working js

 $.ajax({
				type: "POST",
				url: PrayAjax.ajaxurl,
				action: "pray-date", 
				dataType: 'json',
				data: {
					date: date, 
					calcMethod: calcMethod, 
					city: city
				},
				success: function(data) {
					//alert("done");
					alert(data);
				}
			})