diff --git a/src/wp-includes/class-wp-xmlrpc-server.php b/src/wp-includes/class-wp-xmlrpc-server.php
index e8a70ff206..bad5c47844 100644
--- a/src/wp-includes/class-wp-xmlrpc-server.php
+++ b/src/wp-includes/class-wp-xmlrpc-server.php
@@ -1102,6 +1102,21 @@ class wp_xmlrpc_server extends IXR_Server {
 		if ( ! $user = $this->login( $username, $password ) )
 			return $this->error;
 
+		// convert the date field back to IXR form
+		if ( isset( $content_struct['post_date'] ) ) {
+			$content_struct['post_date'] = $this->_convert_date( $content_struct['post_date'] );
+		}
+
+		// ignore the existing GMT date if it is empty or a non-GMT date was supplied in $content_struct,
+		// since _insert_post will ignore the non-GMT date if the GMT date is set
+		if ( isset( $content_struct['post_date_gmt'] ) ) {
+			if ( $content_struct['post_date_gmt'] == '0000-00-00 00:00:00' || isset( $content_struct['post_date'] ) ) {
+				unset( $content_struct['post_date_gmt'] );
+			} else {
+				$content_struct['post_date_gmt'] = $this->_convert_date( $content_struct['post_date_gmt'] );
+			}
+		}
+
 		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
 		do_action( 'xmlrpc_call', 'wp.newPost' );
 
diff --git a/tests/phpunit/tests/xmlrpc/wp/newPost.php b/tests/phpunit/tests/xmlrpc/wp/newPost.php
index 1b775e56fb..4071391261 100644
--- a/tests/phpunit/tests/xmlrpc/wp/newPost.php
+++ b/tests/phpunit/tests/xmlrpc/wp/newPost.php
@@ -305,4 +305,28 @@ class Tests_XMLRPC_wp_newPost extends WP_XMLRPC_UnitTestCase {
 		$this->assertEquals( 401, $result2->code );
 	}
 
+	/**
+	 * @ticket 28601
+	 */
+	function test_invalid_post_date_does_not_fatal() {
+		$this->make_user_by_role( 'author' );
+		$date_string = '2014-01-01 10:10:10';
+		$post = array( 'post_title' => 'test', 'post_content' => 'test', 'post_date' => $date_string );
+		$result = $this->myxmlrpcserver->wp_newPost( array( 1, 'author', 'author', $post ) );
+		$fetched_post = get_post( $result );
+		$this->assertStringMatchesFormat( '%d', $result );
+	}
+
+	/**
+	 * @ticket 28601
+	 */
+	function test_invalid_post_date_gmt_does_not_fatal() {
+		$this->make_user_by_role( 'author' );
+		$date_string = 'invalid date';
+		$post = array( 'post_title' => 'test', 'post_content' => 'test', 'post_date_gmt' => $date_string );
+		$result = $this->myxmlrpcserver->wp_newPost( array( 1, 'author', 'author', $post ) );
+		$fetched_post = get_post( $result );
+		$this->assertStringMatchesFormat( '%d', $result );
+	}
+
 }