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[C++] C++20: use standard calendar / timezone APIs #48593
Description
Describe the enhancement requested
C++20 finally defines standard APIs for calendar dates and timezones: https://en.cppreference.com/w/cpp/chrono.html#Time_zone
However, some old gcc and clang versions that we might need to support don't support these APIs in full.
So we would need to still our date backport on these compilers.
The main point of doing this would be to (hopefully!) use the system-provided timezone automatically on Windows, while the user currently needs to install a timezone databases themselves.
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Activity
pitrou commentedon Dec 18, 2025
@rok
rok commentedon Dec 19, 2025
Getting rid of windows workarounds would be great indeed. I'll take a look asap.
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
Reverting some changes
fix failing tests
apacheGH-48593: [C++] C++20: use standard calendar / timezone APIs
apacheGH-48593: [C++] C++20: use standard calendar / timezone APIs
GH-48593: [C++] C++20: use standard calendar / timezone APIs (#48601)
raulcd commentedon Mar 3, 2026
Issue resolved by pull request 48601
#48601
apacheGH-48593: [C++] C++20: use standard calendar / timezone APIs (a…
apacheGH-48593: [C++] C++20: use standard calendar / timezone APIs (a…