Fix datetime() not setting the timezone to UTC by default.

Author: sdispater

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 
 - Fixed `set()` not acception the `tz` keyword argument.
+- Fixed `datetime()` not setting the timezone to `UTC` by default.
 
 
 ## [1.5.0] - 2018-04-16

pendulum/__init__.py

@@ -90,6 +90,6 @@ def datetime(year, month, day,
 
     return Pendulum(
         year, month, day, hour, minute, second, microsecond,
-        tzinfo=tzinfo or tz,
+        tzinfo=tzinfo or tz or UTC,
         fold=fold
     )

tests/test_helpers.py

@@ -180,6 +180,7 @@ def test_datetime(self):
         dt = pendulum.datetime(2018, 4, 4, 12, 34, 56, 123456)
 
         self.assertPendulum(dt, 2018, 4, 4, 12, 34, 56, 123456)
+        assert dt.timezone_name == 'UTC'
 
         dt = pendulum.datetime(
             2013, 3, 31, 2, 30,