Developed and delivered ISO-8601 Time Display Styles for execution times in the JanDeDobbeleer/oh-my-posh repository, introducing two user-facing formats that standardize time representation in the UI. The implementation, written in Go with supporting documentation in Markdown, provides both rounded-to-second and millisecond-precision options, aligning with ISO 8601 duration semantics. This work improved readability and reduced ambiguity in time metrics, laying the foundation for future analytics and localization features. The approach emphasized backend development, thorough testing, and clear documentation, ensuring consistent formatting and facilitating easier integration with external ISO 8601 tooling for enhanced user experience and onboarding.