diff --git a/blog/before_build.py b/blog/before_build.py
index 8e79b6d3..08786462 100644
--- a/blog/before_build.py
+++ b/blog/before_build.py
@@ -69,7 +69,7 @@ while True:
 
     month = month + 1
     if month > 12:
-        month = 0
+        month = 1
         year = year + 1
 
 lines.reverse()