One Day is a captivating romantic drama by David Nicholls that tells the story of two people, Emma and Dexter, who met on the day of their graduation from university and continued to meet on that same day for the next twenty years. Each chapter of the book represents a slice of their lives in different years, revealing their successes, failures, joys and disappointments. Through the shades of feelings and experiences of the characters, the reader thinks about how time passed and how changes occurred in their attitude towards each other. "One day" is a book that not only captivates with its storyline, but also gives an opportunity to feel the magic of the moment and the importance of live communication.