diff --git a/nixos/modules/monitoring/server/grafana.nix b/nixos/modules/monitoring/server/grafana.nix
index 2fd9e7f7c83217afc4943e644f6d3161e56c49f9..c23150238241db561bae52aa50e4878b6961f9e6 100644
--- a/nixos/modules/monitoring/server/grafana.nix
+++ b/nixos/modules/monitoring/server/grafana.nix
@@ -86,6 +86,8 @@ in {
       extraOptions = {
         # Defend against DNS rebinding attacks.
         SERVER_ENFORCE_DOMAIN = "true";
+        # Same time zone for all users by default
+        DATE_FORMATS_DEFAULT_TIMEZONE = "UTC";
       };
 
       auth = {