diff --git a/shepherd/.env b/shepherd/.env
new file mode 100644
index 0000000..a2b3659
--- /dev/null
+++ b/shepherd/.env
@@ -0,0 +1,3 @@
+# Shepherd variables
+
+TZ=Europe/Oslo
diff --git a/shepherd/docker-compose.yml b/shepherd/docker-compose.yml
index 5246294..6c508cd 100644
--- a/shepherd/docker-compose.yml
+++ b/shepherd/docker-compose.yml
@@ -11,5 +11,5 @@ services:
         constraints:
           - node.role == manager
     environment:
-      TZ: 'Europe/Oslo'
+      TZ: ${TZ}
       SLEEP_TIME: '180m'