Retiring Under FERS: Key Dates for 2025 & 2026 Planning your FERS retirement involves choosing the best dates to retire from the federal government in 2025 and 2026. The optimal dates for 2025 are January 3rd, June 28th, and December 31st. For 2026, the best options are January 2nd, June 27th, and December 31st. These dates provide the greatest potential for annual leave payouts and...