From Investopedia.com …
Most major life-changing events, such as marriage or divorce, involve an ongoing process of emotional adjustment. Retirement is no exception. Marriage, divorce and other family-related issues have been the focus of decades of research and analysis by both clinical therapists and religious institutions.
Unfortunately, the emotional and psychological frontier of retirement has remained virtually unexplored until recently. However, while research on this subject has barely begun, it is clear that the psychological process of retirement process follows a pattern similar in nature to the emotional phases accompanying other areas of transition. Read on to discover the six stages of retirement and what you can do to prepare for this important life transition.