According to my research on studies conducted by Psychologist Erik Erikson, I can say that based on the information provided within the question the stage being described is called the Integrity vs. Despair stage. Like mentioned this stage focuses on the way a person feels after the age of 65 when reevaluating everything that they have done in their lives. Some will reflect on the events of the past and feel extremely satisfied and happy, while other's will be full of regret and doubt.
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