diff --git a/images/docker-unifi-controller.md b/images/docker-unifi-controller.md
index c27095867..d1c390e50 100644
--- a/images/docker-unifi-controller.md
+++ b/images/docker-unifi-controller.md
@@ -71,6 +71,7 @@ services:
     environment:
       - PUID=1000
       - PGID=1000
+      - TZ=Europe/London
       - MEM_LIMIT=1024 #optional
       - MEM_STARTUP=1024 #optional
     volumes:
@@ -95,6 +96,7 @@ docker run -d \
   --name=unifi-controller \
   -e PUID=1000 \
   -e PGID=1000 \
+  -e TZ=Europe/London \
   -e MEM_LIMIT=1024 `#optional` \
   -e MEM_STARTUP=1024 `#optional` \
   -p 8443:8443 \
@@ -135,6 +137,7 @@ Docker images are configured using parameters passed at runtime (such as those a
 | :----: | --- |
 | `PUID=1000` | for UserID - see below for explanation |
 | `PGID=1000` | for GroupID - see below for explanation |
+| `TZ=Europe/London` | Specify a timezone to use (e.g. Europe/London) - [see list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) |
 | `MEM_LIMIT=1024` | Optionally change the Java memory limit. Set to `default` to reset to default |
 | `MEM_STARTUP=1024` | Optionally change the Java initial/minimum memory. Set to `default` to reset to default |