Landing: 2509f241a097

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Project / Subsystem

gcc / libstdc++

Date

2026-08-27

Author

Tomasz Kamiński

Commit

2509f241a097ef247fc4814c5614e3c4e3cc70d2

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 2509f241a097ef247fc4814c5614e3c4e3cc70d2
source_type: github
headline: Libstdc++: Make timezone parser case-insensitive.
tldr: Improves the C++20 chrono timezone database parser to handle case variations in input.
author: Tomasz Kamiński
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• chrono
• timezone
• c++20
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/2509f241a097ef247fc4814c5614e3c4e3cc70d2
date: 2026-08-27T00:00:00.000Z

The C++20 <chrono> library’s timezone database parser has been updated to be case-insensitive, fixing a bug where it failed to recognize timezone indicators like ‘Z’, ‘M’, ‘O’, and ‘L’ if they were uppercase. This change ensures that the parser correctly interprets these indicators regardless of their case, making timezone handling more robust.