diff --git a/lib/l10n.php b/lib/l10n.php
index d2da302b64..f93443b886 100644
--- a/lib/l10n.php
+++ b/lib/l10n.php
@@ -386,8 +386,7 @@ class OC_L10N {
 			case 'time':
 				if($data instanceof DateTime) {
 					return $data->format($this->localizations[$type]);
-				}
-				elseif(is_string($data)) {
+				} elseif(is_string($data) && !is_numeric($data)) {
 					$data = strtotime($data);
 				}
 				$locales = array(self::findLanguage());
diff --git a/tests/lib/l10n.php b/tests/lib/l10n.php
index dfc5790c2e..12eac818f8 100644
--- a/tests/lib/l10n.php
+++ b/tests/lib/l10n.php
@@ -52,4 +52,16 @@ class Test_L10n extends PHPUnit_Framework_TestCase {
 		$this->assertEquals('5 oken', (string)$l->n('%n window', '%n windows', 5));
 	}
 
+	/**
+	 * Issue #4360: Do not call strtotime() on numeric strings.
+	 */
+	public function testNumericStringToDateTime() {
+		$l = new OC_L10N('test');
+		$this->assertSame('February 13, 2009 23:31', $l->l('datetime', '1234567890'));
+	}
+
+	public function testNumericToDateTime() {
+		$l = new OC_L10N('test');
+		$this->assertSame('February 13, 2009 23:31', $l->l('datetime', 1234567890));
+	}
 }