Nathan Jaremko enhanced the apache/arrow-rs repository by introducing explicit time-only field variants, TimeMillis and TimeMicros, to the record API. This work addressed the previous misuse of TimestampMillis for time-only data, clarifying time semantics and improving data fidelity across analytics pipelines. Nathan implemented the necessary trait logic in Rust to support accurate representation and seamless conversion of these new fields, leveraging skills in API development, data serialization, and type systems. The update ensures that time values are handled correctly within the API, reducing ambiguity and aligning with best practices for data structures. The work demonstrates thoughtful, targeted engineering depth.