Z always specifies UTC now

Thanks to vfaronov

Fixes #5

2 files changed, 9 insertions, 1 deletions

diff --git a/iso8601/iso8601.py b/iso8601/iso8601.py
index 86c076b..2be28dc 100644
--- a/iso8601/iso8601.py
+++ b/iso8601/iso8601.py
@@ -134,7 +134,7 @@ def parse_timezone(matches, default_timezone=UTC):
     """
 
     if matches["timezone"] == "Z":
-        return default_timezone
+        return UTC
     # This isn't strictly correct, but it's common to encounter dates without
     # timezones so I'll assume the default (which defaults to UTC).
     # Addresses issue 4.
diff --git a/iso8601/test_iso8601.py b/iso8601/test_iso8601.py
index 079663d..7a3c7a0 100644
--- a/iso8601/test_iso8601.py
+++ b/iso8601/test_iso8601.py
@@ -18,6 +18,14 @@ def test_parse_no_timezone_different_default():
     assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, tz)
     assert d.tzinfo == tz
 
+def test_parse_utc_different_default():
+    """Z should mean 'UTC', not 'default'.
+
+    """
+    tz = iso8601.FixedOffset(2, 0, "test offset")
+    d = iso8601.parse_date("2007-01-01T08:00:00Z", default_timezone=tz)
+    assert d == datetime.datetime(2007, 1, 1, 8, 0, 0, 0, iso8601.UTC)
+
 @pytest.mark.parametrize("invalid_date", [
     ("2013-10-",),
     ("2013-",),