diff --git a/doc/source/timeseries.rst b/doc/source/timeseries.rst
index aed54ab0f5040..0303b41e42e55 100644
--- a/doc/source/timeseries.rst
+++ b/doc/source/timeseries.rst
@@ -12,6 +12,8 @@
    randint = np.random.randint
    np.set_printoptions(precision=4, suppress=True)
    options.display.max_rows=15
+   import dateutil
+   import pytz
    from dateutil.relativedelta import relativedelta
    from pandas.tseries.api import *
    from pandas.tseries.offsets import *
@@ -1266,32 +1268,37 @@ common zones, the names are the same as ``pytz``.
 .. ipython:: python
 
    # pytz
-   rng_utc = date_range('3/6/2012 00:00', periods=10, freq='D', tz='UTC')
-   rng_utc.tz
+   rng_pytz = date_range('3/6/2012 00:00', periods=10, freq='D',
+                         tz='Europe/London')
+   rng_pytz.tz
 
    # dateutil
-   rng_utc_dateutil = date_range('3/6/2012 00:00', periods=10, freq='D',
-                                 tz='dateutil/UTC')
-   rng_utc_dateutil.tz
+   rng_dateutil = date_range('3/6/2012 00:00', periods=10, freq='D',
+                             tz='dateutil/Europe/London')
+   rng_dateutil.tz
 
-You can also construct the timezone explicitly first, which gives you more control over which
-time zone is used:
+   # dateutil - utc special case
+   rng_utc = date_range('3/6/2012 00:00', periods=10, freq='D',
+                        tz=dateutil.tz.tzutc())
+   rng_utc.tz
+
+Note that the ``UTC`` timezone is a special case in ``dateutil`` and should be constructed explicitly
+as an instance of ``dateutil.tz.tzutc``. You can also construct other timezones explicitly first,
+which gives you more control over which time zone is used:
 
 .. ipython:: python
 
    # pytz
-   import pytz
-   tz_pytz = pytz.timezone('UTC')
-   rng_utc = date_range('3/6/2012 00:00', periods=10, freq='D', tz=tz_pytz)
-   rng_utc.tz
+   tz_pytz = pytz.timezone('Europe/London')
+   rng_pytz = date_range('3/6/2012 00:00', periods=10, freq='D',
+                         tz=tz_pytz)
+   rng_pytz.tz == tz_pytz
 
    # dateutil
-   import dateutil
-   tz_dateutil = dateutil.tz.gettz('UTC')
-   rng_utc_dateutil = date_range('3/6/2012 00:00', periods=10, freq='D',
-                                 tz=tz_dateutil)
-   rng_utc_dateutil.tz
-
+   tz_dateutil = dateutil.tz.gettz('Europe/London')
+   rng_dateutil = date_range('3/6/2012 00:00', periods=10, freq='D',
+                             tz=tz_dateutil)
+   rng_dateutil.tz == tz_dateutil
 
 Timestamps, like Python's ``datetime.datetime`` object can be either time zone
 naive or time zone aware. Naive time series and DatetimeIndex objects can be
@@ -1313,9 +1320,10 @@ tz-aware data to another time zone:
    ts_utc.tz_convert('US/Eastern')
 
 .. warning::
-    Be very wary of conversions between libraries as ``pytz`` and ``dateutil``
-    may have different definitions of the time zones. This is more of a problem for
-    unusual timezones than for 'standard' zones like ``US/Eastern``.
+
+	Be wary of conversions between libraries. For some zones ``pytz`` and ``dateutil`` have different
+	definitions of the zone. This is more of a problem for unusual timezones than for
+	'standard' zones like ``US/Eastern``.
 
 Under the hood, all timestamps are stored in UTC. Scalar values from a
 ``DatetimeIndex`` with a time zone will have their fields (day, hour, minute)
@@ -1359,8 +1367,6 @@ TimeSeries, aligning the data on the UTC timestamps:
    result
    result.index
 
-.. _timeseries.timedeltas:
-
 In some cases, localize cannot determine the DST and non-DST hours when there are
 duplicates.  This often happens when reading files that simply duplicate the hours.
 The infer_dst argument in tz_localize will attempt
@@ -1376,6 +1382,8 @@ to determine the right offset.
    rng_hourly_eastern = rng_hourly.tz_localize('US/Eastern', infer_dst=True)
    rng_hourly_eastern.values
 
+.. _timeseries.timedeltas:
+
 Time Deltas
 -----------
 
diff --git a/doc/source/v0.14.1.txt b/doc/source/v0.14.1.txt
index 586e47ff4f303..d38565008640f 100644
--- a/doc/source/v0.14.1.txt
+++ b/doc/source/v0.14.1.txt
@@ -104,11 +104,9 @@ Enhancements
 
   .. ipython:: python
 
-   rng_utc_dateutil = date_range('3/6/2012 00:00',
-                                 periods=10,
-                                 freq='D',
-                                 tz='dateutil/UTC')
-   rng_utc_dateutil.tz
+   rng = date_range('3/6/2012 00:00', periods=10, freq='D',
+                    tz='dateutil/Europe/London')
+   rng.tz
 
   See :ref:`the docs <timeseries.timezone>`.
 
diff --git a/pandas/tests/test_format.py b/pandas/tests/test_format.py
index 302b8ca9983e0..456d331156011 100644
--- a/pandas/tests/test_format.py
+++ b/pandas/tests/test_format.py
@@ -2946,7 +2946,7 @@ def test_tz_pytz(self):
     def test_tz_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
-        utc = dateutil.tz.gettz('UTC')
+        utc = dateutil.tz.tzutc()
 
         dt_date = datetime(2013, 1, 2, tzinfo=utc)
         self.assertEqual(str(dt_date), str(Timestamp(dt_date)))
diff --git a/pandas/tests/test_series.py b/pandas/tests/test_series.py
index 31e5363dd5abe..3881ed5277b85 100644
--- a/pandas/tests/test_series.py
+++ b/pandas/tests/test_series.py
@@ -4630,7 +4630,8 @@ def test_getitem_setitem_datetime_tz_pytz(self):
 
     def test_getitem_setitem_datetime_tz_dateutil(self):
         _skip_if_no_dateutil();
-        from dateutil.tz import gettz as tz
+        from dateutil.tz import gettz, tzutc
+        tz = lambda x: tzutc() if x == 'UTC' else gettz(x)  # handle special case for utc in dateutil
 
         from pandas import date_range
         N = 50
diff --git a/pandas/tseries/tests/test_daterange.py b/pandas/tseries/tests/test_daterange.py
index dd84ee27caf0e..0a732ac7bc7e8 100644
--- a/pandas/tseries/tests/test_daterange.py
+++ b/pandas/tseries/tests/test_daterange.py
@@ -2,7 +2,7 @@
 from pandas.compat import range
 import pickle
 import nose
-
+import sys
 import numpy as np
 
 from pandas.core.index import Index
@@ -36,6 +36,11 @@ def _skip_if_no_cday():
         raise nose.SkipTest("CustomBusinessDay not available.")
 
 
+def _skip_if_windows_python_3():
+    if sys.version_info > (3,) and sys.platform == 'win32':
+        raise nose.SkipTest("not used on python 3/win32")
+
+
 def eq_gen_range(kwargs, expected):
     rng = generate_range(**kwargs)
     assert(np.array_equal(list(rng), expected))
@@ -300,7 +305,7 @@ def test_summary_pytz(self):
     def test_summary_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
-        bdate_range('1/1/2005', '1/1/2009', tz=dateutil.tz.gettz('UTC')).summary()
+        bdate_range('1/1/2005', '1/1/2009', tz=dateutil.tz.tzutc()).summary()
 
     def test_misc(self):
         end = datetime(2009, 5, 13)
@@ -391,8 +396,10 @@ def test_range_tz_pytz(self):
     def test_range_tz_dateutil(self):
         # GH 2906
         _skip_if_no_dateutil()
-        from dateutil.tz import gettz as tz
-
+        # Use maybe_get_tz to fix filename in tz under dateutil.
+        from pandas.tslib import maybe_get_tz
+        tz = lambda x: maybe_get_tz('dateutil/' + x)
+        
         start = datetime(2011, 1, 1, tzinfo=tz('US/Eastern'))
         end = datetime(2011, 1, 3, tzinfo=tz('US/Eastern'))
 
@@ -428,6 +435,7 @@ def test_month_range_union_tz_pytz(self):
         early_dr.union(late_dr)
 
     def test_month_range_union_tz_dateutil(self):
+        _skip_if_windows_python_3()
         _skip_if_no_dateutil()
         from dateutil.tz import gettz as timezone
         tz = timezone('US/Eastern')
@@ -633,7 +641,7 @@ def test_summary_pytz(self):
     def test_summary_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
-        cdate_range('1/1/2005', '1/1/2009', tz=dateutil.tz.gettz('UTC')).summary()
+        cdate_range('1/1/2005', '1/1/2009', tz=dateutil.tz.tzutc()).summary()
 
     def test_misc(self):
         end = datetime(2009, 5, 13)
diff --git a/pandas/tseries/tests/test_period.py b/pandas/tseries/tests/test_period.py
index 81387c3736481..38887ede2faca 100644
--- a/pandas/tseries/tests/test_period.py
+++ b/pandas/tseries/tests/test_period.py
@@ -85,7 +85,8 @@ def test_timestamp_tz_arg(self):
 
     def test_timestamp_tz_arg_dateutil(self):
         import dateutil
-        p = Period('1/1/2005', freq='M').to_timestamp(tz=dateutil.tz.gettz('Europe/Brussels'))
+        from pandas.tslib import maybe_get_tz
+        p = Period('1/1/2005', freq='M').to_timestamp(tz=maybe_get_tz('dateutil/Europe/Brussels'))
         self.assertEqual(p.tz, dateutil.tz.gettz('Europe/Brussels'))
 
     def test_timestamp_tz_arg_dateutil_from_string(self):
diff --git a/pandas/tseries/tests/test_timeseries.py b/pandas/tseries/tests/test_timeseries.py
index 83cc5dcc7485f..04210b4f0c88f 100644
--- a/pandas/tseries/tests/test_timeseries.py
+++ b/pandas/tseries/tests/test_timeseries.py
@@ -58,6 +58,15 @@ def _skip_if_has_locale():
     lang, _ = locale.getlocale()
     if lang is not None:
         raise nose.SkipTest("Specific locale is set {0}".format(lang))
+    
+def _skip_if_windows_python_3():
+    if sys.version_info > (3,) and sys.platform == 'win32':
+        raise nose.SkipTest("not used on python 3/win32")
+
+def _skip_if_not_windows_python_3():
+    if sys.version_info < (3,) or sys.platform != 'win32':
+        raise nose.SkipTest("only run on python 3/win32")
+
 
 class TestTimeSeriesDuplicates(tm.TestCase):
     _multiprocess_can_split_ = True
@@ -406,6 +415,16 @@ def test_timestamp_to_datetime(self):
         self.assertEqual(stamp, dtval)
         self.assertEqual(stamp.tzinfo, dtval.tzinfo)
 
+    def test_timestamp_to_datetime_dateutil(self):
+        _skip_if_no_pytz()
+        rng = date_range('20090415', '20090519',
+                         tz='dateutil/US/Eastern')
+
+        stamp = rng[0]
+        dtval = stamp.to_pydatetime()
+        self.assertEqual(stamp, dtval)
+        self.assertEqual(stamp.tzinfo, dtval.tzinfo)
+
     def test_timestamp_to_datetime_explicit_pytz(self):
         _skip_if_no_pytz()
         import pytz
@@ -418,6 +437,7 @@ def test_timestamp_to_datetime_explicit_pytz(self):
         self.assertEquals(stamp.tzinfo, dtval.tzinfo)
 
     def test_timestamp_to_datetime_explicit_dateutil(self):
+        _skip_if_windows_python_3()
         _skip_if_no_dateutil()
         import dateutil
         rng = date_range('20090415', '20090519',
@@ -467,7 +487,7 @@ def _check_rng(rng):
         _check_rng(rng_eastern)
         _check_rng(rng_utc)
 
-    def test_index_convert_to_datetime_array_explicit_dateutil(self):
+    def test_index_convert_to_datetime_array_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
 
@@ -480,8 +500,8 @@ def _check_rng(rng):
                 self.assertEquals(x.tzinfo, stamp.tzinfo)
 
         rng = date_range('20090415', '20090519')
-        rng_eastern = date_range('20090415', '20090519', tz=dateutil.tz.gettz('US/Eastern'))
-        rng_utc = date_range('20090415', '20090519', tz=dateutil.tz.gettz('UTC'))
+        rng_eastern = date_range('20090415', '20090519', tz='dateutil/US/Eastern')
+        rng_utc = date_range('20090415', '20090519', tz=dateutil.tz.tzutc())
 
         _check_rng(rng)
         _check_rng(rng_eastern)
@@ -1560,14 +1580,14 @@ def test_to_period_tz_explicit_pytz(self):
         self.assert_(result == expected)
         self.assert_(ts.to_period().equals(xp))
 
-    def test_to_period_tz_explicit_dateutil(self):
+    def test_to_period_tz_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
         from dateutil.tz import tzlocal
 
         xp = date_range('1/1/2000', '4/1/2000').to_period()
 
-        ts = date_range('1/1/2000', '4/1/2000', tz=dateutil.tz.gettz('US/Eastern'))
+        ts = date_range('1/1/2000', '4/1/2000', tz='dateutil/US/Eastern')
 
         result = ts.to_period()[0]
         expected = ts[0].to_period()
@@ -1575,7 +1595,7 @@ def test_to_period_tz_explicit_dateutil(self):
         self.assert_(result == expected)
         self.assert_(ts.to_period().equals(xp))
 
-        ts = date_range('1/1/2000', '4/1/2000', tz=dateutil.tz.gettz('UTC'))
+        ts = date_range('1/1/2000', '4/1/2000', tz=dateutil.tz.tzutc())
 
         result = ts.to_period()[0]
         expected = ts[0].to_period()
@@ -1793,17 +1813,17 @@ def test_append_concat_tz_explicit_pytz(self):
         appended = rng.append(rng2)
         self.assert_(appended.equals(rng3))
 
-    def test_append_concat_tz_explicit_dateutil(self):
+    def test_append_concat_tz_dateutil(self):
         # GH 2938
         _skip_if_no_dateutil()
         from dateutil.tz import gettz as timezone
 
         rng = date_range('5/8/2012 1:45', periods=10, freq='5T',
-                         tz=timezone('US/Eastern'))
+                         tz='dateutil/US/Eastern')
         rng2 = date_range('5/8/2012 2:35', periods=10, freq='5T',
-                         tz=timezone('US/Eastern'))
+                         tz='dateutil/US/Eastern')
         rng3 = date_range('5/8/2012 1:45', periods=20, freq='5T',
-                         tz=timezone('US/Eastern'))
+                         tz='dateutil/US/Eastern')
         ts = Series(np.random.randn(len(rng)), rng)
         df = DataFrame(np.random.randn(len(rng), 4), index=rng)
         ts2 = Series(np.random.randn(len(rng2)), rng2)
@@ -2021,11 +2041,11 @@ def test_period_resample_with_local_timezone_dateutil(self):
         _skip_if_no_dateutil()
         import dateutil
 
-        local_timezone = dateutil.tz.gettz('America/Los_Angeles')
+        local_timezone = 'dateutil/America/Los_Angeles'
 
-        start = datetime(year=2013, month=11, day=1, hour=0, minute=0, tzinfo=dateutil.tz.gettz('UTC'))
+        start = datetime(year=2013, month=11, day=1, hour=0, minute=0, tzinfo=dateutil.tz.tzutc())
         # 1 day later
-        end = datetime(year=2013, month=11, day=2, hour=0, minute=0, tzinfo=dateutil.tz.gettz('UTC'))
+        end = datetime(year=2013, month=11, day=2, hour=0, minute=0, tzinfo=dateutil.tz.tzutc())
 
         index = pd.date_range(start, end, freq='H')
 
@@ -2990,13 +3010,13 @@ def compare(x, y):
 
     def test_class_ops_dateutil(self):
         _skip_if_no_dateutil()
-        from dateutil.tz import gettz as timezone
+        from dateutil.tz import tzutc
 
         def compare(x,y):
             self.assertEqual(int(np.round(Timestamp(x).value/1e9)), int(np.round(Timestamp(y).value/1e9)))
 
         compare(Timestamp.now(),datetime.now())
-        compare(Timestamp.now('UTC'), datetime.now(timezone('UTC')))
+        compare(Timestamp.now('UTC'), datetime.now(tzutc()))
         compare(Timestamp.utcnow(),datetime.utcnow())
         compare(Timestamp.today(),datetime.today())
 
@@ -3149,8 +3169,8 @@ def test_cant_compare_tz_naive_w_aware_explicit_pytz(self):
 
     def test_cant_compare_tz_naive_w_aware_dateutil(self):
         _skip_if_no_dateutil()
-        from dateutil.tz import gettz
-        utc = gettz('UTC')
+        from dateutil.tz import tzutc
+        utc = tzutc()
         # #1404
         a = Timestamp('3/12/2012')
         b = Timestamp('3/12/2012', tz=utc)
diff --git a/pandas/tseries/tests/test_timezones.py b/pandas/tseries/tests/test_timezones.py
index 5fb1f9db620ae..51c533df863e6 100644
--- a/pandas/tseries/tests/test_timezones.py
+++ b/pandas/tseries/tests/test_timezones.py
@@ -770,8 +770,12 @@ def setUp(self):
         _skip_if_no_dateutil()
 
     def tz(self, tz):
-        ''' Construct a timezone object from a string. Overridden in subclass to parameterize tests. '''
-        return dateutil.tz.gettz(tz)
+        '''
+        Construct a dateutil timezone.
+        Use tslib.maybe_get_tz so that we get the filename on the tz right
+        on windows. See #7337.
+        '''
+        return tslib.maybe_get_tz('dateutil/' + tz)
 
     def tzstr(self, tz):
         ''' Construct a timezone string from a string. Overridden in subclass to parameterize tests. '''
@@ -784,6 +788,19 @@ def cmptz(self, tz1, tz2):
     def localize(self, tz, x):
         return x.replace(tzinfo=tz)
 
+    def test_utc_with_system_utc(self):
+        from pandas.tslib import maybe_get_tz
+
+        # from system utc to real utc
+        ts = Timestamp('2001-01-05 11:56', tz=maybe_get_tz('dateutil/UTC'))
+        # check that the time hasn't changed.
+        self.assertEqual(ts, ts.tz_convert(dateutil.tz.tzutc()))
+
+        # from system utc to real utc
+        ts = Timestamp('2001-01-05 11:56', tz=maybe_get_tz('dateutil/UTC'))
+        # check that the time hasn't changed.
+        self.assertEqual(ts, ts.tz_convert(dateutil.tz.tzutc()))
+
 
 class TestTimeZones(tm.TestCase):
     _multiprocess_can_split_ = True
diff --git a/pandas/tslib.pyx b/pandas/tslib.pyx
index 9f1db62a54bf3..62e3b120c9d64 100644
--- a/pandas/tslib.pyx
+++ b/pandas/tslib.pyx
@@ -1029,6 +1029,10 @@ cdef inline object _get_zone(object tz):
         return 'UTC'
     else:
         if _treat_tz_as_dateutil(tz):
+            if '.tar.gz' in tz._filename:
+                raise ValueError('Bad tz filename. Dateutil on python 3 on windows has a bug which causes tzfile._filename to be the same for all '
+                                 'timezone files. Please construct dateutil timezones implicitly by passing a string like "dateutil/Europe/London" '
+                                 'when you construct your pandas objects instead of passing a timezone object. See https://github.com/pydata/pandas/pull/7362')
             return 'dateutil/' + tz._filename
         else:
             # tz is a pytz timezone or unknown.
@@ -1048,7 +1052,11 @@ cpdef inline object maybe_get_tz(object tz):
     '''
     if isinstance(tz, string_types):
         if tz.startswith('dateutil/'):
+            zone = tz[9:]
             tz = _dateutil_gettz(tz[9:])
+            # On Python 3 on Windows, the filename is not always set correctly.
+            if isinstance(tz, _dateutil_tzfile) and '.tar.gz' in tz._filename:
+                tz._filename = zone
         else:
             tz = pytz.timezone(tz)
         return tz
@@ -1965,6 +1973,10 @@ cdef inline object _tz_cache_key(object tz):
     if isinstance(tz, _pytz_BaseTzInfo):
         return tz.zone
     elif isinstance(tz, _dateutil_tzfile):
+        if '.tar.gz' in tz._filename:
+            raise ValueError('Bad tz filename. Dateutil on python 3 on windows has a bug which causes tzfile._filename to be the same for all '
+                             'timezone files. Please construct dateutil timezones implicitly by passing a string like "dateutil/Europe/London" '
+                             'when you construct your pandas objects instead of passing a timezone object. See https://github.com/pydata/pandas/pull/7362')
         return tz._filename
     else:
         return None