From e9c6557d554a5a97c651bf527337b22fd1c4e0ab Mon Sep 17 00:00:00 2001
From: Yonry Zhu <10801573+yonryzhu@users.noreply.github.com>
Date: Sun, 5 Jul 2026 22:27:10 -0400
Subject: [PATCH 1/2] add tzdata to fix readthedocs build

---
 docs/sphinx/source/whatsnew/v0.15.3.rst | 1 +
 pyproject.toml                          | 1 +
 2 files changed, 2 insertions(+)

diff --git a/docs/sphinx/source/whatsnew/v0.15.3.rst b/docs/sphinx/source/whatsnew/v0.15.3.rst
index eb36b659ca..0995f274bb 100644
--- a/docs/sphinx/source/whatsnew/v0.15.3.rst
+++ b/docs/sphinx/source/whatsnew/v0.15.3.rst
@@ -14,6 +14,7 @@ Deprecations
 
 Bug fixes
 ~~~~~~~~~
+* Fix missing timezones by adding ``tzdata`` as a dependency. (:issue:`2795`)
 
 
 Enhancements
diff --git a/pyproject.toml b/pyproject.toml
index f359cc846d..2042b8d49c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,6 +17,7 @@ dependencies = [
     'requests',
     'scipy >= 1.7.2',
     'h5py',
+    'tzdata',
 ]
 license = "BSD-3-Clause"
 classifiers = [

From e61e40ccf23401c2604e4e4b1cad24efaf9dc48b Mon Sep 17 00:00:00 2001
From: Yonry Zhu <10801573+yonryzhu@users.noreply.github.com>
Date: Mon, 6 Jul 2026 22:43:52 -0400
Subject: [PATCH 2/2] fix whatsnew and add clarifying tzdata comment

---
 docs/sphinx/source/whatsnew/v0.15.3.rst | 3 ++-
 pyproject.toml                          | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/docs/sphinx/source/whatsnew/v0.15.3.rst b/docs/sphinx/source/whatsnew/v0.15.3.rst
index 0995f274bb..7124d28cae 100644
--- a/docs/sphinx/source/whatsnew/v0.15.3.rst
+++ b/docs/sphinx/source/whatsnew/v0.15.3.rst
@@ -14,11 +14,11 @@ Deprecations
 
 Bug fixes
 ~~~~~~~~~
-* Fix missing timezones by adding ``tzdata`` as a dependency. (:issue:`2795`)
 
 
 Enhancements
 ~~~~~~~~~~~~
+* Ensure all timezones are available in all OSs. (:issue:`2795`, :pull:`2809`)
 
 
 Documentation
@@ -42,6 +42,7 @@ Requirements
 
 Maintenance
 ~~~~~~~~~~~
+* Fix documentation builds on runner images lacking link-type timezones. (:issue:`2795`, :pull:`2809`)
 
 
 Contributors
diff --git a/pyproject.toml b/pyproject.toml
index 2042b8d49c..84d5dbc033 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ dependencies = [
     'requests',
     'scipy >= 1.7.2',
     'h5py',
-    'tzdata',
+    'tzdata', # ensure all timezones are available in all installs for consistency GH#2795
 ]
 license = "BSD-3-Clause"
 classifiers = [