diff --git a/Lib/datetime.py b/Lib/datetime.py
index 01742680a95bb6..1b0c5cb2d1c6ff 100644
--- a/Lib/datetime.py
+++ b/Lib/datetime.py
@@ -1032,13 +1032,13 @@ def ctime(self):
_MONTHNAMES[self._month],
self._day, self._year)
- def strftime(self, fmt):
+ def strftime(self, format):
"""
Format using strftime().
Example: "%d/%m/%Y, %H:%M:%S"
"""
- return _wrap_strftime(self, fmt, self.timetuple())
+ return _wrap_strftime(self, format, self.timetuple())
def __format__(self, fmt):
if not isinstance(fmt, str):
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index bba96698e9e2eb..121d973b6d5f20 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -1489,6 +1489,9 @@ def test_strftime(self):
#check that this standard extension works
t.strftime("%f")
+ # bpo-41260: The parameter was named "fmt" in the pure python impl.
+ t.strftime(format="%f")
+
def test_strftime_trailing_percent(self):
# bpo-35066: Make sure trailing '%' doesn't cause datetime's strftime to
# complain. Different libcs have different handling of trailing
diff --git a/Misc/NEWS.d/next/Library/2020-08-02-23-46-22.bpo-41260.Q2BNzY.rst b/Misc/NEWS.d/next/Library/2020-08-02-23-46-22.bpo-41260.Q2BNzY.rst
new file mode 100644
index 00000000000000..ae2fdd9b84a00e
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-08-02-23-46-22.bpo-41260.Q2BNzY.rst
@@ -0,0 +1,2 @@
+Rename the *fmt* parameter of the pure Python implementation of
+:meth:`datetime.date.strftime` to *format*.
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