GH-44455: [C++] Update vendored date to 3.0.3

ci/appveyor-cpp-build.bat

@@ -139,7 +139,7 @@ set PARQUET_HOME=%CONDA_PREFIX%\Library
 
 @rem Download IANA Timezone Database to a non-standard location to
 @rem test the configurability of the timezone database path
-curl https://data.iana.org/time-zones/releases/tzdata2021e.tar.gz --output tzdata.tar.gz || exit /B
+curl https://data.iana.org/time-zones/releases/tzdata2024b.tar.gz --output tzdata.tar.gz || exit /B
 mkdir %USERPROFILE%\Downloads\test\tzdata
 tar --extract --file tzdata.tar.gz --directory %USERPROFILE%\Downloads\test\tzdata
 curl https://raw.githubusercontent.com/unicode-org/cldr/master/common/supplemental/windowsZones.xml ^

cpp/src/arrow/CMakeLists.txt

@@ -460,7 +460,7 @@ endif()
 
 set(ARROW_VENDORED_SRCS
     vendored/base64.cpp
-    vendored/datetime/tz.cpp
+    vendored/datetime.cpp
     vendored/double-conversion/bignum-dtoa.cc
     vendored/double-conversion/bignum.cc
     vendored/double-conversion/cached-powers.cc
@@ -488,7 +488,7 @@ set(ARROW_VENDORED_SRCS
 if(APPLE)
   list(APPEND ARROW_VENDORED_SRCS vendored/datetime/ios.mm)
 endif()
-set_source_files_properties(vendored/datetime/tz.cpp
+set_source_files_properties(vendored/datetime.cpp
                             PROPERTIES SKIP_PRECOMPILE_HEADERS ON
                                        SKIP_UNITY_BUILD_INCLUSION ON)
 arrow_add_object_library(ARROW_VENDORED ${ARROW_VENDORED_SRCS})

cpp/src/arrow/vendored/datetime.cpp

@@ -0,0 +1,19 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include "datetime/visibility.h"
+#include "datetime/tz.cpp"

cpp/src/arrow/vendored/datetime.h

@@ -17,10 +17,11 @@
 
 #pragma once
 
-#include "arrow/vendored/datetime/date.h"  // IWYU pragma: export
-#include "arrow/vendored/datetime/tz.h"    // IWYU pragma: export
+#include "arrow/vendored/datetime/visibility.h"  // IWYU pragma: export
+#include "arrow/vendored/datetime/date.h"        // IWYU pragma: export
+#include "arrow/vendored/datetime/tz.h"          // IWYU pragma: export
 
 // Can be defined by date.h.
 #ifdef NOEXCEPT
-#undef NOEXCEPT
+#  undef NOEXCEPT
 #endif

cpp/src/arrow/vendored/datetime/README.md

@@ -17,12 +17,16 @@ copies or substantial portions of the Software.
 Sources for datetime are adapted from Howard Hinnant's date library
 (https://github.com/HowardHinnant/date).
 
-Sources are taken from changeset 1ead6715dec030d340a316c927c877a3c4e5a00c
+Sources are taken from changeset 5bdb7e6f31fac909c090a46dbd9fea27b6e609a4
 of the above project.
 
 The following changes are made:
 - fix internal inclusion paths (from "date/xxx.h" to simply "xxx.h")
 - enclose the `date` namespace inside the `arrow_vendored` namespace
-- include a custom "visibility.h" header from "tz.cpp" for proper DLL
-  exports on Windows
-- disable curl-based database downloading in "tz.h"
+
+## How to update
+
+```console
+$ cd cpp/src/arrow/vendored/datetime
+$ ./update.sh 3.0.3
+```

cpp/src/arrow/vendored/datetime/date.h

@@ -84,9 +84,7 @@
 #   pragma warning(disable : 4127)
 #endif
 
-namespace arrow_vendored
-{
-namespace date
+namespace arrow_vendored::date
 {
 
 //---------------+
@@ -8234,8 +8232,7 @@ operator<<(std::basic_ostream<CharT, Traits>& os,
                  detail::get_units<CharT>(typename Period::type{});
 }
 
-}  // namespace date
-}  // namespace arrow_vendored
+}  // namespace arrow_vendored::date
 
 #ifdef _MSC_VER
 #   pragma warning(pop)

cpp/src/arrow/vendored/datetime/ios.h

@@ -32,9 +32,7 @@
 # if TARGET_OS_IPHONE
 #   include <string>
 
-    namespace arrow_vendored
-    {
-    namespace date
+    namespace arrow_vendored::date
     {
     namespace iOSUtils
     {
@@ -43,8 +41,7 @@
     std::string get_current_timezone();
 
     }  // namespace iOSUtils
-    }  // namespace date
-    }  // namespace arrow_vendored
+    }  // namespace arrow_vendored::date
 
 # endif  // TARGET_OS_IPHONE
 #else   // !__APPLE__

cpp/src/arrow/vendored/datetime/ios.mm

@@ -47,9 +47,7 @@
 #define TAR_SIZE_POSITION               124
 #define TAR_SIZE_SIZE                   12
 
-namespace arrow_vendored
-{
-namespace date
+namespace arrow_vendored::date
 {
     namespace iOSUtils
     {
@@ -334,7 +332,6 @@ bool writeFile(const std::string &tzdataPath, const std::string &fileName,
         }
 
     }  // namespace iOSUtils
-}  // namespace date
-}  // namespace arrow_vendored
+}  // namespace arrow_vendored::date
 
 #endif  // TARGET_OS_IPHONE