diff --git a/src/Orchard.Web/Config/log4net.config b/src/Orchard.Web/Config/log4net.config
index 999e11599..8f8348b76 100644
--- a/src/Orchard.Web/Config/log4net.config
+++ b/src/Orchard.Web/Config/log4net.config
@@ -54,7 +54,7 @@
     <staticLogFileName value="false" />
     <rollingStyle value="Date" />
     <rollingStyleFrequency value="Once" />
-    <datepattern value="-dd.MM.yyyy'.log'" />
+    <datepattern value="-yyyy.MM.dd'.log'" />
 
     <layout type="log4net.Layout.PatternLayout">
       <conversionPattern value="%date [%thread] %logger - %message%newline" />
@@ -73,7 +73,7 @@
     <staticLogFileName value="false" />
     <rollingStyle value="Date" />
     <rollingStyleFrequency value="Once" />
-    <datepattern value="-dd.MM.yyyy'.log'" />
+    <datepattern value="-yyyy.MM.dd'.log'" />
 
     <filter type="log4net.Filter.LevelRangeFilter">
       <!-- only error and fatal messages end up in this target, even if child loggers accept lower priority -->