diff --git a/pandas/_libs/tslibs/period.pyx b/pandas/_libs/tslibs/period.pyx
index 2ec0649110948..e7b93f9f67cfe 100644
--- a/pandas/_libs/tslibs/period.pyx
+++ b/pandas/_libs/tslibs/period.pyx
@@ -2664,6 +2664,7 @@ class Period(_Period):
         One of pandas period strings or corresponding objects. Accepted
         strings are listed in the
         :ref:`offset alias section <timeseries.offset_aliases>` in the user docs.
+        If value is datetime, freq is required.
     ordinal : int, default None
         The period offset from the proleptic Gregorian epoch.
     year : int, default None
diff --git a/pandas/core/indexes/period.py b/pandas/core/indexes/period.py
index f40d63c8b8128..fd7cab0344e42 100644
--- a/pandas/core/indexes/period.py
+++ b/pandas/core/indexes/period.py
@@ -478,7 +478,7 @@ def period_range(
     ----------
     start : str, datetime, date, pandas.Timestamp, or period-like, default None
         Left bound for generating periods.
-    end : str or period-like, default None
+    end : str, datetime, date, pandas.Timestamp, or period-like, default None
         Right bound for generating periods.
     periods : int, default None
         Number of periods to generate.