Its ironic this question should come up on a Monday, but it has to do with optimum time to retire:
The ideal retirement age is 66 or older. Working past age 65 could lead to a longer life, while retiring early may be a risk factor for dying earlier, according to researchers from Oregon State University in Corvalis. Specifically, healthy adults who retired one year past age 65 had an 11 percent lower risk of death from all causes, even when taking into account demographic, lifestyle and health issues. Adults who described themselves as unhealthy were also likely to live longer if they kept working, the findings showed, which indicates that factors beyond health may affect post-retirement mortality.
Have you set a target age, or is this a moving target?