diff --git a/src/superfluous.c b/src/superfluous.c
index 3fe1f133..56e752a7 100644
--- a/src/superfluous.c
+++ b/src/superfluous.c
@@ -541,7 +541,7 @@ InitXThing(WScreen *scr)
 
     t = time(NULL);
     l = localtime(&t);
-    if ((l->tm_mon!=12||l->tm_mday<24||l->tm_mday>26)) {
+    if ((l->tm_mon!=11||l->tm_mday<24||l->tm_mday>26)) {
 	return False;
     }