gostaria de lista os produtos vendido no sistema de estoque que estou criando

<?php
require_once '../App/auth.php';
require_once '../layout/script.php';
require_once '../App/Models/vendas.class.php';
require_once '../App/Models/cliente.class.php';
require_once '../App/Models/connect.php';
 require '../layout/alert.php';
echo $head;
echo $header;
echo $aside;
echo '<div class="content-wrapper">
 <!-- Content Header (Page header) -->
 <section class="content-header">
 <h1>
 Todos os produtos
 </h1>
 <ol class="breadcrumb">
 <li><a href="../"><i class="fa fa-dashboard"></i> inicio</a></li>
 <li class="active">Itens</li>
 </ol>
 </section>

 <!-- Main content -->
 <section class="content">
 ';
 echo '
 <div class="row">
 <div class="box box-primary">
 <div class="box-header">
 <i class="ion ion-clipboard"></i>
 <h3 class="box-title">lista de Vendas</h3>
 <div class="box-tools pull-right">
 <ul class="pagination pagination-sm inline">
 <li><a href="#">&laquo;</a></li>
 <li><a href="#">1</a></li>
 <li><a href="#">2</a></li>
 <li><a href="#">3</a></li>
 <li><a href="#">&raquo;</a></li>
 </ul>
 </div>
 </div>
 <!-- /.box-header -->
 <div class="box-body">
 <ul class="todo-list">';
	echo "
 <form action='../App/Database/Vervendas.php'>
 <div class='form-group has-feedback'>
 <select type='number' name='dia[]' style='width:50px;' id='dia' placeholder='dia'>
 <option value='1'>1</option>
 <option value='2'>2</option>
 <option value='3'>3</option>
 <option value='4'>4</option>
 <option value='5'>5</option>
 <option value='6'>6</option>
 <option value='7'>7</option>
 <option value='8'>8</option>
 <option value='9'>9</option>
 <option value='10'>10</option>
 <option value='11'>11</option>
 <option value='12'>12</option>
 <option value='13'>13</option>
 <option value='14'>14</option>
 <option value='15'>15</option>
 <option value='16'>16</option>
 <option value='17'>17</option>
 <option value='18'>18</option>
 <option value='19'>19</option>
 <option value='20'>20</option>
 <option value='21'>21</option>
 <option value='22'>22</option>
 <option value='23'>23</option>
 <option value='24'>24</option>
 <option value='25'>25</option>
 <option value='26'>26</option>
 <option value='27'>27</option>
 <option value='28'>28</option>
 <option value='29'>29</option>
 <option value='30'>30</option>
 <option value='31'>31</option>
 </select><b>/</b>
 <select name='mes[]' style='width:50px;' id='mes' placeholder='mes'>
 <option value='1'>1</option>
 <option value='2'>2</option>
 <option value='3'>3</option>
 <option value='4'>4</option>
 <option value='5'>5</option>
 <option value='6'>6</option>
 <option value='7'>7</option>
 <option value='8'>8</option>
 <option value='9'>9</option>
 <option value='10'>10</option>
 <option value='11'>11</option>
 <option value='12'>12</option>
 </select><b>/</b>
 <select name='ano[]' style='width:50px;' id='ano' placeholder='ano'>
 <option value='2019'>2019</option>
 <option value='2020'>2020</option>
 <option value='2021'>2021</option>
 <option value='2022'>2022</option>
 <option value='2023'>2023</option>
 <option value='2024'>2024</option>
 <option value='2025'>2025</option>
 <option value='2026'>2026</option>
 <option value='2027'>2027</option>
 <option value='2028'>2028</option>
 <option value='2029'>2029</option>
 <option value='2030'>2030</option>
 </select>
 <button type='submit' name='Busca'>Busca</button>
 </div>
 </form>
 ";

echo '</div>';
echo '</section>';

echo '</div>';

echo $footer;
echo $javascript;
?>

<?php
require_once '../../App/auth.php';
require_once '../../App/Models/vendas.class.php';

 $dia=$_POST['dia'];
 $mes=$_POST['mes'];
 $ano=$_POST['ano'];
 $date=$vendas->ListaVendas($dia,$mes,$ano);
 header('Location: ../../vendas/suasvendas.php');
?>

	Não Estou Conseguindo pega o valor no de dia mes e ano