From 6bedad3d57f373cce9366ec8d4639cb45ef76bbd Mon Sep 17 00:00:00 2001
From: Dennis Eichhorn <spl1nes.com@googlemail.com>
Date: Sun, 14 Feb 2016 23:08:54 +0100
Subject: [PATCH] Year bug fix

---
 Datatypes/SmartDateTime.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Datatypes/SmartDateTime.php b/Datatypes/SmartDateTime.php
index c708ed837..f242f0fb5 100644
--- a/Datatypes/SmartDateTime.php
+++ b/Datatypes/SmartDateTime.php
@@ -91,7 +91,7 @@ class SmartDateTime extends \DateTime
     public function smartModify(int $y, int $m = 0, int $d = 0, int $calendar = CAL_GREGORIAN) : SmartDateTime
     {
         $y_change    = floor(((int) $this->format('m') + $m) / 12);
-        $y_change    = ((int) $this->format('m') + $m) < 0 && ((int) $this->format('m') + $m) % 12 === 0 ? $y_change - 1 : $y_change;
+        $y_change    = ((int) $this->format('m') + $m) <= 0 && ((int) $this->format('m') + $m) % 12 === 0 ? $y_change - 1 : $y_change;
         $y_new       = (int) $this->format('Y') + $y + $y_change;
         $m_new       = ((int) $this->format('m') + $m) % 12;
         $m_new       = $m_new === 0 ? 12 : $m_new < 0 ? 12 + $m_new : $m_new;