Contributed to the xupefei/spark repository by developing ANSI-compliant timestamp handling features and enhancing error diagnostics for SQL and Python integrations. Over two months, implemented the try_make_timestamp family of functions in Scala and Python, ensuring robust error handling by throwing on invalid inputs and aligning with ANSI-first defaults. Improved error messaging for timestamp parsing, guiding users toward safer variants and increasing reliability in backend data engineering workflows. Delivered a targeted bug fix that standardized error reporting for invalid fractional seconds by updating parameter types, resulting in clearer user feedback and more stable timestamp processing across Spark’s SQL backend.