Identifying Tone in a Memoir Excerpt

Read the following excerpt from a memoir reflecting on childhood memories:

"As I walked through the old neighborhood, I could hear the echoes of laughter and the distant sounds of children playing. The streets were familiar, yet they felt shrouded in a veil of nostalgia, transporting me back to a time of innocence and joy. Each corner held a story, each house a memory, and I found myself smiling at the beauty of those days gone by. Yet beneath this veneer of happiness, I sensed a twinge of sadness, a reminder that those moments were forever in the past. It was a bittersweet feeling, both uplifting and heavy with the weight of time."