diff --git a/infra/common/default.nix b/infra/common/default.nix
index 0630f2f..88e61d2 100644
--- a/infra/common/default.nix
+++ b/infra/common/default.nix
@@ -4,4 +4,7 @@
     ./networking.nix
     ./users.nix
   ];
+
+  time.timeZone = "Europe/Amsterdam";
+  i18n.defaultLocale = "en_US.UTF-8";
 }
diff --git a/infra/vm02116/configuration.nix b/infra/vm02116/configuration.nix
index 01f855f..aa1432b 100644
--- a/infra/vm02116/configuration.nix
+++ b/infra/vm02116/configuration.nix
@@ -9,12 +9,6 @@
     ip6 = "2a00:51c0:12:1201::20";
   };
 
-  # Set your time zone.
-  time.timeZone = "Europe/Amsterdam";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_US.UTF-8";
-
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [
diff --git a/infra/vm02179/configuration.nix b/infra/vm02179/configuration.nix
index 59a5add..263b94c 100644
--- a/infra/vm02179/configuration.nix
+++ b/infra/vm02179/configuration.nix
@@ -9,12 +9,6 @@
     ip6 = "2a00:51c0:12:1201::179";
   };
 
-  # Set your time zone.
-  time.timeZone = "Europe/Amsterdam";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_US.UTF-8";
-
   nix = {
     settings.trusted-users = [ "@wheel" ];
   };
diff --git a/infra/vm02186/procolix-configuration.nix b/infra/vm02186/procolix-configuration.nix
index ea0c923..96c9ac5 100644
--- a/infra/vm02186/procolix-configuration.nix
+++ b/infra/vm02186/procolix-configuration.nix
@@ -9,12 +9,6 @@
     ip6 = "2a00:51c0:12:1201::186";
   };
 
-  # Set your time zone.
-  time.timeZone = "Europe/Amsterdam";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_US.UTF-8";
-
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [
diff --git a/infra/vm02187/configuration.nix b/infra/vm02187/configuration.nix
index 3c58f39..6de5a01 100644
--- a/infra/vm02187/configuration.nix
+++ b/infra/vm02187/configuration.nix
@@ -71,12 +71,6 @@
 
   users.users.nginx.extraGroups = [ "acme" ];
 
-  # Set your time zone.
-  time.timeZone = "Europe/Amsterdam";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_US.UTF-8";
-
   # List packages installed in system profile. To search, run:
   # $ nix search wget
   environment.systemPackages = with pkgs; [