diff --git a/python/lib/evaluations/dmod/evaluations/_version.py b/python/lib/evaluations/dmod/evaluations/_version.py
index 0404d8103..e1424ed0e 100644
--- a/python/lib/evaluations/dmod/evaluations/_version.py
+++ b/python/lib/evaluations/dmod/evaluations/_version.py
@@ -1 +1 @@
-__version__ = '0.3.0'
+__version__ = '0.3.1'
diff --git a/python/lib/evaluations/dmod/evaluations/util.py b/python/lib/evaluations/dmod/evaluations/util.py
index 9cbd2279e..9f2126b60 100644
--- a/python/lib/evaluations/dmod/evaluations/util.py
+++ b/python/lib/evaluations/dmod/evaluations/util.py
@@ -632,9 +632,9 @@ def __init__(
         # is incremented by 1 to ensure that it matches in and out of leap years.
         if isinstance(day, pandas.Timestamp):
             if not day.is_leap_year and day >= datetime(day.year, month=3, day=1, tzinfo=day.tzinfo):
-                day = day.day_of_year + 1
+                day = day.dayofyear + 1
             else:
-                day = day.day_of_year
+                day = day.dayofyear
 
         self.__day = numpy.core.uint16(day)