diff --git a/modules/core/i18n.nix b/modules/core/i18n.nix
index 1b524282..e83d20b2 100644
--- a/modules/core/i18n.nix
+++ b/modules/core/i18n.nix
@@ -15,6 +15,11 @@ with lib; {
     };
     i18n = {
       defaultLocale = "en_US.UTF-8";
+      supportedLocales = [
+        "C.UTF-8/UTF-8"
+        "en_US.UTF-8/UTF-8"
+        "de_DE.UTF-8/UTF-8"
+      ];
     };
   };
 }
diff --git a/modules/graphical/.config/waybar/config b/modules/graphical/.config/waybar/config
index 7eac8d9d..9c520720 100644
--- a/modules/graphical/.config/waybar/config
+++ b/modules/graphical/.config/waybar/config
@@ -37,10 +37,12 @@
   "clock": {
       "tooltip-format": "<tt><small>{calendar}</small></tt>",
       "format": "{:%H:%M} ",
-      "format-alt": "{:%a %d. %h %H:%M} ",
+      //"format-alt": "{:%a %d. %h %H:%M} ",
       //"on-scroll": {
       //    "calendar": 1
       //}
+      "format-alt": "{:%A, %d. %B %Y %R} ",
+      "locale": "de_DE.UTF-8",
       "smooth-scrolling-threshold": 1.0,
       "calendar": {
           "mode-mon-col"  : 3,