The UPSC conducts the Civil Services Examination once every year, typically beginning with the preliminary stage in June, followed by the Mains in September or October, and the interviews for selected candidates in early the following year. This cyclical process allows adequate preparation time for aspirants while maintaining a structured timeline for evaluations. The entire selection process is crucial for recruiting candidates into various civil services in India, ensuring a steady influx of qualified individuals capable of handling governance and administrative responsibilities efficiently.