diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index 065a223..cafb6ba 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.php
@@ -304,13 +304,13 @@
 			$time = time();
 		}
 
-		return gmmktime(
-			date('G', $time),
-			date('i', $time),
-			date('s', $time),
-			date('n', $time),
-			date('j', $time),
-			date('Y', $time)
+		return mktime(
+			gmdate('G', $time),
+			gmdate('i', $time),
+			gmdate('s', $time),
+			gmdate('n', $time),
+			gmdate('j', $time),
+			gmdate('Y', $time)
 		);
 	}
 }
diff --git a/tests/codeigniter/helpers/date_helper_test.php b/tests/codeigniter/helpers/date_helper_test.php
index 1d397ac..8258c92 100644
--- a/tests/codeigniter/helpers/date_helper_test.php
+++ b/tests/codeigniter/helpers/date_helper_test.php
@@ -196,9 +196,9 @@
 	public function test_local_to_gmt()
 	{
 		$this->assertEquals(
-			gmmktime(
-				date('G', $this->time), date('i', $this->time), date('s', $this->time),
-				date('n', $this->time), date('j', $this->time), date('Y', $this->time)
+			mktime(
+				gmdate('G', $this->time), gmdate('i', $this->time), gmdate('s', $this->time),
+				gmdate('n', $this->time), gmdate('j', $this->time), gmdate('Y', $this->time)
 			),
 			local_to_gmt($this->time)
 		);