What makes the fers best dates to retire 2025 so important? These dates align with key federal policies that influence when your annuity begins and how your final paycheck is calculated. Retiring just a day earlier or later than ideal could cause major delays in payments or loss of valuable benefits. The fers best dates to retire 2025 were chosen based on years of experience and patterns in federal processing. If you want to maximize every dollar of your retirement package, you need to choose one of these prime dates. Let your retirement begin with confidence and clarity.