Landing: 610134a51fa3
Project / Subsystem
gcc / libstdc++
Date
2026-07-16
Author
Tomasz Kamiński
Commit
610134a51fa3d0bcd3e0980c6574557172dc88c0
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 610134a51fa3d0bcd3e0980c6574557172dc88c0
- source_type
- github
- headline
- libstdc++: Apply rule triggering at Zone line transition
- tldr
- Fixes timezone data parsing to correctly handle rules triggering exactly at transition boundaries.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • timezone
- • bugfix
- • consistency
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-16T00:00:00.000Z
This commit addresses an issue in libstdc++‘s timezone handling where rules triggering precisely at a zone line transition were not always correctly applied. This resulted in inconsistencies compared to the standard date library for certain zones, such as Europe/Lisbon in 1976. The fix ensures that find_active_rule considers rules firing exactly at the transition time, improving the accuracy and consistency of timezone information.