dates._from_ordinalf: Use normal rounding for microseconds

nmartensen · nmartensen · commit a549ab53f91c · 2017-12-22T18:11:16.000+01:00
diff --git a/lib/matplotlib/dates.py b/lib/matplotlib/dates.py
@@ -286,8 +286,8 @@ def _from_ordinalf(x, tz=None):
 
     remainder = float(x) - ix
 
-    # Round down to the nearest microsecond.
-    dt += datetime.timedelta(microseconds=int(remainder * MUSECONDS_PER_DAY))
+    # Round to the nearest microsecond.
+    dt += datetime.timedelta(microseconds=int(round(remainder * MUSECONDS_PER_DAY)))
 
     # Compensate for rounding errors
     if dt.microsecond < 10:
