Alternating years cannot be considered the functional time either, since a year is the result of a complete rotation of the Earth around the Sun, that is, the result of a simple displacement.
Days, nights and years are the subjective time, since they emerge and exist only in the consciousness of a person.
There are a lot of micro and macro processes occurring in any object as a result of the realization of its potentialities and its interaction with the environment. However, the time of an object does not represent the totality of the times emerged at various levels of the matter’s structural organization. The proper time of an object is determined by a complex of qualitatively new changes occurring in the single whole.
A human being, who as any other object determines their own time, can illustrate the external manifestation of changes in a single whole. In this case, there is childhood, adolescence, youth, etc.
The term “proper time” is also known to be used in the theory of relativity. Through the lens of this theory, proper time is measured with a “good clock” associated with a body in motion. While the proper functional time could be measured with a “perfect clock” capable of accurately repeating the rhythm and duration of successive changes in qualitatively new states of an object or a process. In practice, though, the functional time can be measured with an ordinary clock with the account of the specific process course, that is the rhythm and the current durations determined by its successively changing qualitatively new states.
The proper time of the theory of relativity emerges only in case of an intellectual experiment. For this reason, it is the subjective time. If the observer is removed from the intellectual experiment, the temporal relationship will no longer emerge, since the postulated time, imagined by a person, emerges only in their consciousness. If there is no one observing the motion of a body, an object, there will be no association with a “good clock” that would measure the proper time.
The proper functional time emerge in the objective reality independently of a person's consciousness. The current duration emerge and exists regardless of the observer. Since there is no perfect clock that can accurately repeat the rhythm and the durations formed by the successively changing states of this process in the nature, as already mentioned, it can be measured with an ordinary clock with the account of the specific process course, that is the rhythm and the current durations determined by its successively changing qualitatively new states.