diff --git a/modules/gnome-base.nix b/modules/gnome-base.nix
index 65cdfd9..c40f449 100644
--- a/modules/gnome-base.nix
+++ b/modules/gnome-base.nix
@@ -19,6 +19,8 @@
     gnome.gnome-system-monitor # Resource monitor / task manager
   ]);
 
+  # GNOME Calendar comes preinstalled. https://nixos.wiki/wiki/GNOME/Calendar
+
   # Enable the X11 windowing system.
   services.xserver.enable = true;