diff --git a/ansible/group_vars/all/base.yml b/ansible/group_vars/all/base.yml
new file mode 100644
index 0000000..03df6c2
--- /dev/null
+++ b/ansible/group_vars/all/base.yml
@@ -0,0 +1 @@
+TZ: Europe/London
diff --git a/ansible/main.yml b/ansible/main.yml
index 4d41c15..6f49dba 100644
--- a/ansible/main.yml
+++ b/ansible/main.yml
@@ -4,7 +4,7 @@
     - role: geerlingguy.ntp
       become: true
       vars:
-        ntp_timezone: Europe/London
+        ntp_timezone: "{{ TZ }}"
         ntp_manage_config: true
       when: ansible_os_family != 'Alpine'  # https://github.com/ansible-collections/community.general/issues/781
     - role: realorangeone.reflector
diff --git a/ansible/roles/deluge/files/docker-compose.yml b/ansible/roles/deluge/files/docker-compose.yml
index 088632d..6056caa 100644
--- a/ansible/roles/deluge/files/docker-compose.yml
+++ b/ansible/roles/deluge/files/docker-compose.yml
@@ -7,7 +7,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     volumes:
       - ./deluge:/config
       - /mnt/downloads:/downloads
diff --git a/ansible/roles/duplicati/files/docker-compose.yml b/ansible/roles/duplicati/files/docker-compose.yml
index d37fbc7..cfb4853 100644
--- a/ansible/roles/duplicati/files/docker-compose.yml
+++ b/ansible/roles/duplicati/files/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     environment:
       - PUID=0
       - PGID=0
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     volumes:
       - ./config:/config
       - ./restore:/restore
diff --git a/ansible/roles/forrest/files/docker-compose.yml b/ansible/roles/forrest/files/docker-compose.yml
index 11acb3f..c36b0b2 100644
--- a/ansible/roles/forrest/files/docker-compose.yml
+++ b/ansible/roles/forrest/files/docker-compose.yml
@@ -4,7 +4,7 @@ services:
   grafana:
     image: grafana/grafana:latest
     environment:
-      - TZ=Europe/London
+      - TZ={{ TZ }}
       - GF_DATABASE_URL=postgres://grafana:grafana@db/grafana
       - GF_RENDERING_SERVER_URL=http://renderer:8081/render
       - GF_RENDERING_CALLBACK_URL=http://grafana:3000/
@@ -30,4 +30,4 @@ services:
     image: grafana/grafana-image-renderer:latest
     restart: unless-stopped
     environment:
-      - BROWSER_TZ=Europe/London
+      - BROWSER_TZ={{ TZ }}
diff --git a/ansible/roles/pve_docker/files/calibre/docker-compose.yml b/ansible/roles/pve_docker/files/calibre/docker-compose.yml
index b43f3dd..c586936 100644
--- a/ansible/roles/pve_docker/files/calibre/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/calibre/docker-compose.yml
@@ -5,7 +5,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     restart: unless-stopped
     volumes:
       - ./calibre:/config
diff --git a/ansible/roles/pve_docker/files/gotify/docker-compose.yml b/ansible/roles/pve_docker/files/gotify/docker-compose.yml
index de9563a..38d0d34 100644
--- a/ansible/roles/pve_docker/files/gotify/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/gotify/docker-compose.yml
@@ -3,7 +3,7 @@ services:
   gotify:
     image: gotify/server:2.0.21
     environment:
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     volumes:
       - ./data:/app/data
     restart: unless-stopped
diff --git a/ansible/roles/pve_docker/files/librespeed/docker-compose.yml b/ansible/roles/pve_docker/files/librespeed/docker-compose.yml
index 234d076..d296c7f 100644
--- a/ansible/roles/pve_docker/files/librespeed/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/librespeed/docker-compose.yml
@@ -5,7 +5,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     ports:
       - 33377:80
     restart: unless-stopped
diff --git a/ansible/roles/pve_docker/files/nextcloud/docker-compose.yml b/ansible/roles/pve_docker/files/nextcloud/docker-compose.yml
index 67a04e8..82a07dd 100644
--- a/ansible/roles/pve_docker/files/nextcloud/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/nextcloud/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
       - DOCKER_MODS=theorangeone/lsio-mod-more-processes:latest
     volumes:
       - ./nextcloud/apps:/config/www/nextcloud/apps
diff --git a/ansible/roles/pve_docker/files/quassel/docker-compose.yml b/ansible/roles/pve_docker/files/quassel/docker-compose.yml
index 29fe75d..7b39fae 100644
--- a/ansible/roles/pve_docker/files/quassel/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/quassel/docker-compose.yml
@@ -5,7 +5,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
       - DB_BACKEND=PostgreSQL
       - DB_PGSQL_USERNAME=quassel
       - DB_PGSQL_PASSWORD=quassel
diff --git a/ansible/roles/pve_docker/files/tt-rss/docker-compose.yml b/ansible/roles/pve_docker/files/tt-rss/docker-compose.yml
index d16f0a8..72afc71 100644
--- a/ansible/roles/pve_docker/files/tt-rss/docker-compose.yml
+++ b/ansible/roles/pve_docker/files/tt-rss/docker-compose.yml
@@ -6,7 +6,7 @@ services:
     environment:
       - PUID={{ docker_user.id }}
       - PGID={{ docker_user.id }}
-      - TZ=Europe/London
+      - TZ={{ TZ }}
     volumes:
       - ./tt-rss/config.php:/config/config.php:ro
       - ./tt-rss/feed-icons:/config/feed-icons