Date formats... Pls help

1

Hi I am abit stuck… i have a form with the following code


<form action="" method="post">

<label>Signin date</label>
<input type="text" name="signInDate" >
<input type="submit" value="Submit">
</form>

and on the same page i have


if(isset($_POST['signInDate']))
	{
	$signing = $_POST['signInDate'];
	$inputDate = date("d-m-Y",strtotime($signing));
	$newdate = strtotime('+3 day, +2 month' ,strtotime($signing)) ;
	$newdate = date("Y-m-d",$newdate);


	        $newdate = strtotime('+17 day, +0 Month' ,strtotime($signing)) ;
		$newdate = date("d-F-Y",$newdate);
		
		echo "date Input was " .  $inputDate ;
		echo "<br>date calc is " .  $newdate . "<br>"  ;
	}

The calculations are fine but to make it work the dates in the form for some reason is needs me to add in this format mm/dd/yyyy

i want it to be input in dd/mm/yyyy …
any help or suggestion will be appreciated

Surf