diff --git a/controllers/admin/AdminDeliverySlipController.php b/controllers/admin/AdminDeliverySlipController.php
index 0b8bc23c4..1cfb6c817 100644
--- a/controllers/admin/AdminDeliverySlipController.php
+++ b/controllers/admin/AdminDeliverySlipController.php
@@ -66,7 +66,7 @@ class AdminDeliverySlipControllerCore extends AdminController
 			),
 			'input' => array(
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('From:'),
 					'name' => 'date_from',
 					'size' => 20,
@@ -75,7 +75,7 @@ class AdminDeliverySlipControllerCore extends AdminController
 					'desc' => $this->l('Format: 2007-12-31 (inclusive)')
 				),
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('To:'),
 					'name' => 'date_to',
 					'size' => 20,
diff --git a/controllers/admin/AdminInvoicesController.php b/controllers/admin/AdminInvoicesController.php
index ade26d2db..41868feaf 100644
--- a/controllers/admin/AdminInvoicesController.php
+++ b/controllers/admin/AdminInvoicesController.php
@@ -80,7 +80,7 @@ class AdminInvoicesControllerCore extends AdminController
 			),
 			'input' => array(
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('From:'),
 					'name' => 'date_from',
 					'size' => 20,
@@ -89,7 +89,7 @@ class AdminInvoicesControllerCore extends AdminController
 					'desc' => $this->l('Format: 2007-12-31 (inclusive)')
 				),
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('To:'),
 					'name' => 'date_to',
 					'size' => 20,
diff --git a/controllers/admin/AdminSlipController.php b/controllers/admin/AdminSlipController.php
index 5a552aa60..f1b2c2770 100644
--- a/controllers/admin/AdminSlipController.php
+++ b/controllers/admin/AdminSlipController.php
@@ -74,7 +74,7 @@ class AdminSlipControllerCore extends AdminController
 			),
 			'input' => array(
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('From:'),
 					'name' => 'date_from',
 					'size' => 20,
@@ -83,7 +83,7 @@ class AdminSlipControllerCore extends AdminController
 					'desc' => $this->l('Format: 2007-12-31 (inclusive)')
 				),
 				array(
-					'type' => 'text',
+					'type' => 'date',
 					'label' => $this->l('To:'),
 					'name' => 'date_to',
 					'size' => 20,