Historical knowledge significantly contributes to a candidate's performance in UPSC by providing a comprehensive understanding of the past and its influence on the present. Candidates well-versed in history can draw connections between historical events and current societal issues, enhancing their analytical skills. This understanding also aids in answering questions related to polity, society, and governance, where historical context is often crucial. Furthermore, a solid grasp of historical events can enrich answers in the essay paper, showcasing a candidate's depth of knowledge and critical thinking. Overall, historical knowledge is an asset for UPSC aspirants.