What is the tone used in sonnet 73?

Sonnet 73 by William Shakespeare is characterized by a tone that is somber, reflective, and wistful. The speaker expresses a sense of melancholy and regret as he contemplates the passage of time and the inevitability of death. The overall tone is one of resignation and acceptance, as the speaker acknowledges the finite nature of human existence and the futility of trying to escape the ravages of time.