[refresh.sh] Update time zone data to TZDB 2026b

[dart-ecosystem-bot]

Automated update to the latest IANA Time Zone Database version 2026b.
See the IANA Time Zone Database homepage for announcements and details on recent data changes.

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[github-actions]

PR Health

Unused Dependencies ✔️

Package	Status
timezone	✔️ All dependencies utilized correctly.

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Breaking changes ✔️

Package	Change	Current Version	New Version	Needed Version	Looking good?
timezone	None	0.11.1	0.11.1	0.11.1	✔️

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API leaks ✔️

The following packages contain symbols visible in the public API, but not exported by the library. Export these symbols or remove them from your publicly visible API.

Package	Leaked API symbol	Leaking sources

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Changelog Entry ❗

Package	Changed Files
package:timezone	pkgs/timezone/lib/data/latest.dart pkgs/timezone/lib/data/latest.tzf pkgs/timezone/lib/data/latest_10y.dart pkgs/timezone/lib/data/latest_10y.tzf pkgs/timezone/lib/data/latest_all.dart pkgs/timezone/lib/data/latest_all.tzf pkgs/timezone/lib/src/common_locations.dart

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Coverage ⚠️

File	Coverage
pkgs/timezone/lib/data/latest.dart	💚 67 %
pkgs/timezone/lib/data/latest_10y.dart	💔 Not covered
pkgs/timezone/lib/data/latest_all.dart	💔 Not covered
pkgs/timezone/lib/src/common_locations.dart	💔 Not covered

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License Headers ✔️

// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

Files
no missing headers

All source files should start with a license header.

Unrelated files missing license headers

Files
pkgs/timezone/example/example.dart
pkgs/timezone/test/datetime_browser_test.dart
pkgs/timezone/test/datetime_test.dart
pkgs/timezone/test/datetime_test_no_database.dart
pkgs/timezone/test/env_test.dart
pkgs/timezone/test/two_way_test.dart
pkgs/timezone/test/zicfile_test.dart
pkgs/timezone/test/zone_tab_test.dart
pkgs/timezone/tool/encode_dart.dart
pkgs/timezone/tool/encode_tzf.dart
pkgs/timezone/tool/get.dart
pkgs/timezone/tool/test_random.dart
pkgs/timezone/tool/zone_dump.dart

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