diff --git a/2018-08-06-earliest.py b/2018-08-06-earliest.py
index e8dafc7..04bccf1 100644
--- a/2018-08-06-earliest.py
+++ b/2018-08-06-earliest.py
@@ -17,7 +17,7 @@ class Date:
 
 
 def get_earliest(*date_strings):
-    dates = [Date(date_string) for date_string in date_strings]
+    dates = map(Date, date_strings)
     return str(min(dates))