diff --git a/scripts/backup.sh b/scripts/backup.sh
index f4fc7f5..1866690 100755
--- a/scripts/backup.sh
+++ b/scripts/backup.sh
@@ -74,7 +74,7 @@ rsync -a "$CONFIG_DIR/" "$BACKUP_DIR/$BACKUP_NAME/config/"
 cat > "$BACKUP_DIR/$BACKUP_NAME/metadata.json" << EOF
 {
   "timestamp": "$TIMESTAMP",
-  "date": "$(date -Iseconds)",
+  "date": "$(date "+%Y-%m-%dT%H:%M:%S%z")",
   "source": "$TARGET_DIR",
   "service_stopped": $STOP_SERVICE,
   "version": "$(cd "$TARGET_DIR" && python3 -c 'import tomllib; print(tomllib.load(open("pyproject.toml","rb"))["project"]["version"])' 2>/dev/null || echo 'unknown')"