diff --git a/CHANGELOG b/CHANGELOG
index c7f0258..e423c6d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,9 +1,9 @@
 V 2.0.0 UNRELEASED
-	Remove DateY and replace it by real XY datetime, date, time and timedelta support.
-	Introduce new XY configuration options: `xrange`, `x_value_formatter`
-	Rework the ghost mechanism to come back to a more object oriented behavior (WIP)
+	Rework the ghost mechanism to come back to a more object oriented behavior (Maybe)
 
-V 1.6.3
+V 1.7.0
+	Remove DateY and replace it by real XY datetime, date, time and timedelta support. (#188)
+	Introduce new XY configuration options: `xrange`, `x_value_formatter`.
 	Add show_x_labels option to remove them and the x axis.
 	Set print_values to False by default.
 	Fix secondary serie text values when None in data. (#192)
diff --git a/pygal/__init__.py b/pygal/__init__.py
index fbb9b56..0d16844 100644
--- a/pygal/__init__.py
+++ b/pygal/__init__.py
@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '1.6.3'
+__version__ = '1.7.0'
 import sys
 from pygal.config import Config
 from pygal.ghost import Ghost, REAL_CHARTS
diff --git a/pygal/_compat.py b/pygal/_compat.py
index 138ea12..55e2f03 100644
--- a/pygal/_compat.py
+++ b/pygal/_compat.py
@@ -63,7 +63,7 @@ def total_seconds(td):
     return td.total_seconds()
 
 
-def to_timestamp(x):
+def timestamp(x):
     if hasattr(x, 'timestamp'):
         return x.timestamp()
     else:
diff --git a/pygal/graph/time.py b/pygal/graph/time.py
index d9a8963..f273840 100644
--- a/pygal/graph/time.py
+++ b/pygal/graph/time.py
@@ -22,12 +22,12 @@ Various datetime line plot
 
 from pygal.graph.xy import XY
 from datetime import datetime, date, time, timedelta
-from pygal._compat import to_timestamp
+from pygal._compat import timestamp, total_seconds
 
 
 def datetime_to_timestamp(x):
     if isinstance(x, datetime):
-        return to_timestamp(x)
+        return timestamp(x)
     return x
 
 
@@ -45,7 +45,7 @@ def time_to_datetime(x):
 
 def timedelta_to_seconds(x):
     if isinstance(x, timedelta):
-        return x.total_seconds()
+        return total_seconds(x)
     return x
 
 
diff --git a/pygal/test/test_date.py b/pygal/test/test_date.py
index 875284d..8ac08fe 100644
--- a/pygal/test/test_date.py
+++ b/pygal/test/test_date.py
@@ -19,6 +19,7 @@
 from pygal import DateLine, TimeLine, DateTimeLine, TimeDeltaLine
 from pygal.test.utils import texts
 from datetime import datetime, date, time, timedelta
+import sys
 
 
 def test_date():
@@ -96,9 +97,9 @@ def test_timedelta():
     ])
 
     q = timedelta_chart.render_pyquery()
-
     assert list(
-        q(".axis.x text").map(texts)) == [
+        t for t in q(".axis.x text").map(texts) if t != '0:00:00'
+    ) == [
             '1 day, 3:46:40',
             '2 days, 7:33:20',
             '3 days, 11:20:00',