diff --git a/parse.py b/parse.py
index 51a6953..80242e1 100644
--- a/parse.py
+++ b/parse.py
@@ -288,7 +288,7 @@ def strf_date_convert(x, _, type):
     elif is_time:
         return dt.time()
     else:
-        ValueError("Datetime not a date nor a time?")
+        raise ValueError("Datetime not a date nor a time?")
 
 
 # ref: https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes