diff --git a/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date.enso b/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date.enso
index f89771fa9298..a0f40a55875d 100644
--- a/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date.enso
+++ b/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date.enso
@@ -267,7 +267,7 @@ type Date
 
              from Standard.Base import Date
 
-             example_workdays = Date.new 2020 1 1 . workdays_until (Date.new 2020 1 5)
+             example_workdays = Date.new 2020 1 1 . work_days_until (Date.new 2020 1 5)
     work_days_until : Date -> Vector Date -> Boolean -> Integer
     work_days_until self end holidays=[] include_end_date=False =
         if include_end_date then self.work_days_until (end + 1.day) holidays include_end_date=False else
diff --git a/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date_Time.enso b/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date_Time.enso
index cba775f30af0..6626de84d837 100644
--- a/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date_Time.enso
+++ b/distribution/lib/Standard/Base/0.0.0-dev/src/Data/Time/Date_Time.enso
@@ -427,8 +427,7 @@ type Date_Time
              example_shift = Date_Time.new 2020 2 3 11 45 . add_work_days 5
     add_work_days : Integer -> Vector Date -> Date_Time
     add_work_days self days=1 holidays=[] =
-        diff = Time_Utils.days_between self.date (self.date.add_work_days days holidays)
-        self + diff.days
+        self.date.add_work_days days holidays . to_date_time self.time_of_day self.zone
 
     ## Subtract the specified amount of time from this instant to get a new
        instant.