Add documentation for tz.win module
diff --git a/docs/index.rst b/docs/index.rst
index 244ae5f..05536dd 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,6 +24,7 @@
    relativedelta
    rrule
    tz
+   tz.win <tzwin>
    utils
    zoneinfo
    examples
diff --git a/docs/tzwin.rst b/docs/tzwin.rst
new file mode 100644
index 0000000..0a200de
--- /dev/null
+++ b/docs/tzwin.rst
@@ -0,0 +1,22 @@
+======
+tz.win
+======
+
+.. py:currentmodule:: dateutil.tz.win
+
+.. automodule:: dateutil.tz.win
+
+Classes
+-------
+
+.. autoclass:: tzres
+    :members:
+
+.. autoclass:: tzwin
+    :members: list, display, transitions
+    :undoc-members:
+
+.. autoclass:: tzwinlocal
+    :members: display, transitions
+    :undoc-members:
+