Bugfix/time zone handling in api test suite for deterministic execution in UTC (#7149)

* Fix time zone handling for deterministic execution in UTC

* Update changelog

CHANGELOG.md

@@ -10,6 +10,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added support for filtering in the public access for portfolio sharing (experimental)
 - Set up the language localization for Japanese (`ja`)
 
+### Fixed
+
+- Fixed the time zone handling in the `api` test suite for deterministic execution in `UTC`
+
 ## 3.17.0 - 2026-06-26
 
 ### Added

apps/api/jest.config.ts

@@ -1,4 +1,8 @@
 /* eslint-disable */
+
+// Run tests in UTC for deterministic date-based calculations
+process.env.TZ = 'UTC';
+
 export default {
   displayName: 'api',