diff --git a/Dockerfile b/Dockerfile
index 3d87a8eb47..e05de8d591 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -43,6 +43,5 @@ COPY scripts/world scripts/world/
 COPY scripts/database scripts/database/
 COPY manage.py .
 
-ENV TZ UTC # Fix timezone (do not change - see issue #3638)
 EXPOSE 5000
 CMD ["gunicorn", "-c", "python:backend.gunicorn", "manage:application"]
diff --git a/example.env b/example.env
index 94c6d8d791..56c47c8300 100644
--- a/example.env
+++ b/example.env
@@ -165,6 +165,12 @@ TM_DEFAULT_LOCALE=en
 # TM_SUPPORTED_LANGUAGES_CODES="ar, cs, de, el, en, es, fa_IR, fr, he, hu, id, it, ja, ko, mg, ml, nl_NL, pt, pt_BR, ru, sv, sw, tl, tr, uk, zh_TW"
 # TM_SUPPORTED_LANGUAGES="عربى, Čeština, Deutsch, Ελληνικά, English, Español, فارسی, Français, עברית, Magyar, Indonesia, Italiano, 日本語, 한국어, Malagasy, Malayalam, Nederlands, Português, Português (Brasil), Русский язык, Svenska, Kiswahili, Filipino (Tagalog), Türkçe, Українська, 繁體中文"
 
+# Local time zone
+# A valid time zone, in the form of Continent/City
+# https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+
+TZ=Europe/London
+
 # Time to wait until task auto-unlock (optional)
 # (e.g. '2h' or '7d' or '30m' or '1h30m')
 #