diff --git a/scheduler.module b/scheduler.module
index d7d5d9c..25f9eec 100644
--- a/scheduler.module
+++ b/scheduler.module
@@ -550,6 +550,7 @@ function scheduler_form_alter(&$form, $form_state) {
           '#required' => $publishing_required,
           '#default_value' => isset($defaults->publish_on) && $defaults->publish_on ? format_date($defaults->publish_on, 'custom', $internal_date_format) : '',
           '#description' => filter_xss(implode(' ', $descriptions)),
+          '#value_callback' => 'scheduler_date_value_callback',
         );
         if ($use_date_popup) {
           // Make this a popup calendar widget.
@@ -576,6 +577,7 @@ function scheduler_form_alter(&$form, $form_state) {
           '#required' => $unpublishing_required,
           '#default_value' => isset($defaults->unpublish_on) && $defaults->unpublish_on ? format_date($defaults->unpublish_on, 'custom', $internal_date_format) : '',
           '#description' => filter_xss(implode(' ', $descriptions)),
+          '#value_callback' => 'scheduler_date_value_callback',
         );
 
         if ($use_date_popup) {
@@ -593,6 +595,25 @@ function scheduler_form_alter(&$form, $form_state) {
 }
 
 /**
+ * Callback function for the Scheduler date entry elements.
+ */
+function scheduler_date_value_callback(&$element, $input = FALSE, &$form_state) {
+  // When processing a delete operation the user should not be forced to enter a
+  // date. Hence set the scheduler date element's #required attribute to FALSE.
+  // Test the input operation against $form_state['values']['delete'] as this
+  // will match the value of the Delete button even if translated.
+  if (isset($form_state['input']['op']) && isset($form_state['values']['delete']) && $form_state['input']['op'] == $form_state['values']['delete']) {
+    $element['#required'] = FALSE;
+  }
+  // If using date popup then process the callback that would have been done had
+  // Scheduler not replaced this with its own one. If using plain text entry
+  // then no return value is needed.
+  if (_scheduler_use_date_popup()) {
+    return date_popup_element_value_callback($element, $input, $form_state);
+  }
+}
+
+/**
  * Displays a list of nodes that are scheduled for (un)publication.
  *
  * This will appear as a tab on the content admin page ('admin/content').
diff --git a/scheduler.test b/scheduler.test
index b9c9498..cb515e6 100644
--- a/scheduler.test
+++ b/scheduler.test
@@ -41,7 +41,7 @@ class SchedulerTestCase extends DrupalWebTestCase {
     $this->drupalCreateContentType(array('type' => 'page', 'name' => t('Basic page')));
 
     // Create an administrator user.
-    $this->admin_user = $this->drupalCreateUser(array('access content', 'administer scheduler', 'create page content', 'edit own page content', 'view own unpublished content', 'administer nodes', 'schedule (un)publishing of nodes'));
+    $this->admin_user = $this->drupalCreateUser(array('access content', 'administer scheduler', 'create page content', 'edit own page content', 'delete own page content', 'view own unpublished content', 'administer nodes', 'schedule (un)publishing of nodes'));
 
     // Add scheduler functionality to the page node type.
     variable_set('scheduler_publish_enable_page', 1);
@@ -595,4 +595,31 @@ class SchedulerTestCase extends DrupalWebTestCase {
     }
   }
 
+  /**
+   * Tests the deletion of a scheduled node.
+   *
+   * This tests if it is possible to delete a node that does not have a
+   * publication date set, when scheduled publishing is required.
+   * @see https://drupal.org/node/1614880
+   */
+  public function testScheduledNodeDelete() {
+    // Log in.
+    $this->drupalLogin($this->admin_user);
+
+    // Create a published and an unpublished node, both without scheduling.
+    $unpublished_node = $this->drupalCreateNode(array('type' => 'page', 'status' => 0));
+    $published_node = $this->drupalCreateNode(array('type' => 'page', 'status' => 1));
+
+    // Make scheduled publishing and unpublishing required.
+    variable_set('scheduler_publish_required_page', TRUE);
+    variable_set('scheduler_unpublish_required_page', TRUE);
+
+    // Check that deleting the nodes does not throw form validation errors.
+    $this->drupalPost('node/' . $published_node->nid . '/edit', array(), t('Delete'));
+    $this->assertNoRaw(t('Error message'), 'No error messages are shown when trying to delete a published node with no scheduling information.');
+
+    $this->drupalPost('node/' . $unpublished_node->nid . '/edit', array(), t('Delete'));
+    $this->assertNoRaw(t('Error message'), 'No error messages are shown when trying to delete an unpublished node with no scheduling information.');
+  }
+
 }