Final answer:
John and Mary are in the stage of life called Transitional Adulthood or Midlife Transition, which is part of middle adulthood. During this stage, people typically have stable careers and more resources for activities like vacations.
Step-by-step explanation:
John and Mary are in the stage of life called Transitional Adulthood or Midlife Transition. This stage, also known as middle adulthood, begins in the mid-30s and continues until the mid-60s. During this time, people typically have stable careers and more resources, such as time and money, for activities like vacations. They are also likely to experience physical signs of aging, such as gray hair and wrinkles.