Contributed to the mdn/browser-compat-data repository by implementing a new timeZone option for the JavaScript Intl.DateTimeFormat API, enabling support for UTC offsets in date and time formatting. This work involved updating JSON-based browser compatibility data to accurately reflect the expanded API capabilities across different environments. The developer ensured that all changes adhered to web standards and front end development best practices, resolving linting issues and aligning with the repository’s style guidelines to maintain CI reliability. Collaboration with a co-author helped deliver a cohesive pull request, resulting in improved cross-browser consistency for developers relying on standardized date formatting options.