forms - PHP echo date: Function name must be string error -

i'm writing registration form when need print date page them sure gave right date says:

fatal error: function name must string in [address]

do have idea what's problem? here important part of form:

<form action='/register.php' method='post'> <input type='date' id='regdate' name='regdate'> </form> 

and here php print (in registration.php)

<?php $bdate = $_post("regdate"); $ebd = date("m-d-y",$bdate); echo $ebd; ?> 

try code

<?php $bdate = $_post["regdate"]; $ebd = date("m-d-y",strtotime($bdate)); echo $ebd; ?>