time of life - a period of time during which a person is normally in a particular life state

mid-sixties, sixties - the time of life between 60 and 70

mid-seventies, seventies - the time of life between 70 and 80

mid-eighties, eighties - the time of life between 80 and 90

mid-nineties, nineties - the time of life between 90 and 100

dotage, second childhood, senility - mental infirmity as a consequence of old age; sometimes shown by foolish infatuations