one’s time of life—
1. is used with reference to a person’s age, specifically middle age:
- The ignorant will be apt to think it an occupation ill suited to my time of life.
2. (euph.) menopause in women:
- Aidan has already threatened me with psychiatrists. He says it is “my time of life.”
time of one’s life—
1. a particular period in a person’s life:
- She told me about Oxford. It evidently was the pleasantest time of her life.
2. (in the phrase “have the time of one’s life”) a period of exceptional enjoyment:
- We will design a program that is so much fun that you will have the time of your life.
See also: lifetime / time of life.