ramanathan1504 opened a new issue, #3885:
URL: https://github.com/apache/logging-log4j2/issues/3885
### Description
The `compatibilityOfLegacyPattern` test in `NamedInstantPatternTest` fails
when the build is run in an environment with a timezone that has a non-zero
minute offset, such as India Standard Time (GMT+05:30).
The test asserts that a legacy date formatter and a new formatter produce
identical output. For the `ISO8601_OFFSET_DATE_TIME_HH` enum value, the legacy
formatter produces a timezone offset with minutes (e.g., `+0530`), while the
new formatter produces an offset with only hours (e.g., `+05`), causing the
assertion to fail.
This was discovered while working on PR #3874.
### Configuration
* **Version:** `2.26.0-SNAPSHOT`
* **Operating system:** `[macOS 26]`
* **JDK:** `[OpenJDK 17.0.5]`
* **Timezone:** `GMT+05:30 (e.g., Asia/Kolkata)`
### Logs
```
[INFO] Running org.apache.logging.log4j.core.pattern.NamedInstantPatternTest
[ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed:
0.123 s <<< FAILURE! - in
org.apache.logging.log4j.core.pattern.NamedInstantPatternTest
[ERROR]
compatibilityOfLegacyPattern(org.apache.logging.log4j.core.pattern.NamedInstantPattern)
Time elapsed: 0.1 s <<< FAILURE!
org.opentest4j.AssertionFailedError:
[Compatibility failed for pattern: 'ISO8601_OFFSET_DATE_TIME_HH']
expected: "2025-08-17T12:10:08,887+0530"
but was: "2025-08-17T12:10:08,887+05"
at
org.apache.logging.log4j.core.pattern.NamedInstantPatternTest.compatibilityOfLegacyPattern(NamedInstantPatternTest.java:45)
```
### Reproduction
1. Set the local machine's system timezone to one with a 30 or 45-minute
offset. For example, `Asia/Kolkata` (India Standard Time, GMT+05:30).
2. Check out the `main` branch of the `logging-log4j2` repository.
3. Run the build with `mvn clean install`.
4. Observe the build failure in the `log4j-core-test` module, originating
from `NamedInstantPatternTest`.
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