Recommended timeframes for each stage of the UPSC preparation journey typically span several months to a few years. Candidates should allocate 6-12 months for preliminary preparation, focusing on building a strong foundation in core subjects. The Mains exam preparation usually requires additional 6 months, allowing time for comprehensive study and practice. Post-exam, candidates should prepare for the interview stage by dedicating around 2-3 months for mock interviews and current affairs updates. Adjustments based on individual strengths and weaknesses are advised.