From 28b196fe48b5ab10a3411315f385b9637d33720b Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Fri, 28 Apr 2023 15:53:09 +0200
Subject: [PATCH 1/3] extend the policy interval for python to 30 months

---
 ci/min_deps_check.py                     | 2 +-
 doc/getting-started-guide/installing.rst | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/ci/min_deps_check.py b/ci/min_deps_check.py
index 9631cb03162..c6eb2dfff47 100755
--- a/ci/min_deps_check.py
+++ b/ci/min_deps_check.py
@@ -29,7 +29,7 @@
     "pytest-timeout",
 }
 
-POLICY_MONTHS = {"python": 24, "numpy": 18}
+POLICY_MONTHS = {"python": 30, "numpy": 18}
 POLICY_MONTHS_DEFAULT = 12
 POLICY_OVERRIDE: dict[str, tuple[int, int]] = {}
 errors = []
diff --git a/doc/getting-started-guide/installing.rst b/doc/getting-started-guide/installing.rst
index 6fa068457c9..9fee849a341 100644
--- a/doc/getting-started-guide/installing.rst
+++ b/doc/getting-started-guide/installing.rst
@@ -86,7 +86,7 @@ Minimum dependency versions
 Xarray adopts a rolling policy regarding the minimum supported version of its
 dependencies:
 
-- **Python:** 24 months
+- **Python:** 30 months
   (`NEP-29 <https://numpy.org/neps/nep-0029-deprecation_policy.html>`_)
 - **numpy:** 18 months
   (`NEP-29 <https://numpy.org/neps/nep-0029-deprecation_policy.html>`_)

From e1a1f7803015b686ffc93cc02352bd10da3f9258 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Fri, 28 Apr 2023 16:24:10 +0200
Subject: [PATCH 2/3] extend the hard-coded list of python release dates

---
 ci/min_deps_check.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ci/min_deps_check.py b/ci/min_deps_check.py
index c6eb2dfff47..0f7002ea513 100755
--- a/ci/min_deps_check.py
+++ b/ci/min_deps_check.py
@@ -109,6 +109,9 @@ def metadata(entry):
                 (3, 6): datetime(2016, 12, 23),
                 (3, 7): datetime(2018, 6, 27),
                 (3, 8): datetime(2019, 10, 14),
+                (3, 9): datetime(2020, 10, 5),
+                (3, 10): datetime(2021, 10, 4),
+                (3, 11): datetime(2022, 10, 24),
             }
         )
 

From e8ff9fe1341ec024df4924d559d92f7a9f66c93a Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Fri, 28 Apr 2023 17:20:03 +0200
Subject: [PATCH 3/3] changelog

---
 doc/whats-new.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/whats-new.rst b/doc/whats-new.rst
index bfc040eb271..d690cf3a824 100644
--- a/doc/whats-new.rst
+++ b/doc/whats-new.rst
@@ -26,7 +26,8 @@ New Features
 
 Breaking changes
 ~~~~~~~~~~~~~~~~
-
+- adjust the deprecation policy for python to once again align with NEP-29 (:issue:`7765`, :pull:`7793`)
+  By `Justus Magin <https://github.com/keewis>`_.
 
 Deprecations
 ~~~~~~~~~~~~