Identifying Tone in Literary Excerpt

Read the following excerpt from a novel:

"The sun dipped below the horizon, casting a gentle glow across the tranquil lake. It was a moment of peace, a brief respite from the chaos of the world. As the birds began to settle in for the night, their soft chirping filled the air, creating a soothing symphony that calmed the mind and heart."

What is the tone of the excerpt?