From bda3a0cab618933bde3395182210346830a54863 Mon Sep 17 00:00:00 2001
From: buhtz <c.buhtz@posteo.jp>
Date: Fri, 27 Oct 2023 12:25:36 +0900
Subject: [PATCH] fix(doc): Install sphinx_rtd_theme explicit

While building the docs on readthedocs.org (RTD) the package sphinx_rtd_theme is explicit installed. The reason is a change on the side of RTD.
---
 .readthedocs.yaml      | 15 ++++++++++++---
 common/doc-dev/conf.py |  2 +-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 768711678..9207c01cb 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,7 +10,13 @@ build:
   os: ubuntu-22.04
   tools:
     python: "3"
-
+  jobs:
+    # Workaround: See PR #1554 for details.
+    # When migrating to use a pyprojects.toml file switch from this
+    # workaround to the use of "python: install: extra_requirements..."
+    # See also: https://docs.readthedocs.io/en/stable/config-file/v2.html#packages
+    post_create_environment:
+      - python -m pip install sphinx_rtd_theme
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: common/doc-dev/conf.py
@@ -19,5 +25,8 @@ sphinx:
 # We recommend specifying your dependencies to enable reproducible builds:
 # https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 # python:
-#   install:
-#   - requirements: docs/requirements.txt
\ No newline at end of file
+#  install:
+#  - method: pip
+#    path: .
+#    extra_requirements:
+#    - foo
diff --git a/common/doc-dev/conf.py b/common/doc-dev/conf.py
index 9830abe77..16ff83ca8 100644
--- a/common/doc-dev/conf.py
+++ b/common/doc-dev/conf.py
@@ -160,7 +160,7 @@
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-html_last_updated_fmt = '%b %d, %Y, %H:%M'
+html_last_updated_fmt = '%b %d, %Y, %H:%M (%Z)'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.