diff --git a/home-manager/systemd.nix b/home-manager/systemd.nix
index 0a584f42..0edffdd3 100644
--- a/home-manager/systemd.nix
+++ b/home-manager/systemd.nix
@@ -4,6 +4,14 @@
   # https://github.com/nix-community/home-manager/blob/release-24.05/modules/systemd.nix#L161-L173
   systemd = {
     user = {
+      # Enable locale for GNOME, terminals respect home.sessionVariables instead
+      # https://superuser.com/a/1841368
+      # https://github.com/nix-community/home-manager/blob/5ec753a1fc4454df9285d8b3ec0809234defb975/modules/systemd.nix#L92-L96
+      sessionVariables = {
+        # GNOME clock respects LC_TIME. And does not support displaying iso-8601 format even if set en_DK
+        LC_TIME = "ja_JP.UTF-8";
+      };
+
       services.podman = {
         Unit = {
           Description = "Podman API Service";