diff --git a/Dockerfile b/Dockerfile
index 7213825..c094194 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -35,11 +35,14 @@ RUN curl -R -O -L https://luarocks.org/releases/luarocks-${LUAROCKS_VER}.tar.gz
 RUN luarocks install busted
 RUN luarocks install alt-getopt
 RUN luarocks install moonscript
+RUN luarocks install date
+RUN luarocks install lua-tz
+RUN luarocks install luatz
 
 FROM ubuntu:24.04
 
 RUN apt-get update && \
-    apt-get install -y jq && \
+    apt-get install -y jq tzdata && \
     rm -rf /var/lib/apt/lists/* && \
     apt-get purge --auto-remove && \
     apt-get clean
diff --git a/README.md b/README.md
index 3cc12e0..59e9670 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,14 @@
 
 The Docker image to automatically run tests on [MoonScript](https://github.com/exercism/moonscript) solutions submitted to [Exercism].
 
+## Added LuaRocks
+
+For student solutions, these additional luarocks have been added to the test-runner image:
+
+* [lua-tz](https://luarocks.org/modules/anaef/lua-tz)
+* [date](https://luarocks.org/modules/tieske/date)
+* [luatz](https://luarocks.org/modules/daurnimator/luatz)
+
 ## Run the test runner
 
 To run the tests of a single solution, do the following:
diff --git a/tests/can-use-lua-tz/.busted b/tests/can-use-lua-tz/.busted
new file mode 100644
index 0000000..86b84e7
--- /dev/null
+++ b/tests/can-use-lua-tz/.busted
@@ -0,0 +1,5 @@
+return {
+  default = {
+    ROOT = { '.' }
+  }
+}
diff --git a/tests/can-use-lua-tz/can_use_lua_tz.moon b/tests/can-use-lua-tz/can_use_lua_tz.moon
new file mode 100644
index 0000000..02b2455
--- /dev/null
+++ b/tests/can-use-lua-tz/can_use_lua_tz.moon
@@ -0,0 +1,8 @@
+tz = require 'tz'
+
+utc_time = ->
+  timespec = year: 2014, month: 11, day: 1, hour: 20
+  zone = 'UTC'
+  tz.time timespec, zone
+
+utc_time
diff --git a/tests/can-use-lua-tz/can_use_lua_tz_spec.moon b/tests/can-use-lua-tz/can_use_lua_tz_spec.moon
new file mode 100644
index 0000000..9bf6028
--- /dev/null
+++ b/tests/can-use-lua-tz/can_use_lua_tz_spec.moon
@@ -0,0 +1,5 @@
+utc_time = require 'can_use_lua_tz'
+
+describe 'one test', ->
+  it 'test time in UTC', ->
+    assert.are.equal 1414872000, utc_time!
diff --git a/tests/can-use-lua-tz/expected_results.json b/tests/can-use-lua-tz/expected_results.json
new file mode 100644
index 0000000..bcb7531
--- /dev/null
+++ b/tests/can-use-lua-tz/expected_results.json
@@ -0,0 +1 @@
+{"tests":[{"status":"pass","name":"test time in UTC","test_code":"    assert.are.equal 1414872000, utc_time!"}],"status":"pass","version":2}