diff --git a/nixos/modules/config/timezone.nix b/nixos/modules/config/timezone.nix
index c8592284077..06857139311 100644
--- a/nixos/modules/config/timezone.nix
+++ b/nixos/modules/config/timezone.nix
@@ -14,10 +14,14 @@ in
     time = {
 
       timeZone = mkOption {
-        default = "CET";
+        default = "UTC";
         type = types.str;
         example = "America/New_York";
-        description = "The time zone used when displaying times and dates.";
+        description = ''
+          The time zone used when displaying times and dates. See <link
+          xlink:href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones"/>
+          for a comprehensive list of possible values for this setting.
+        '';
       };
 
       hardwareClockInLocalTime = mkOption {