diff --git a/_Sidebar.md b/_Sidebar.md
index 909bd2d..76d6f47 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -113,6 +113,7 @@
 * [Gantt Chart](Gantt)
 * [Due Date](Due-Date)
 * [Day of week start](Day-of-week-start)
+* [Calendar](Calendar)
 
 # <a name="Features"></a>Features