I've read one of her books when I was in primary school... that would be at least 20 years ago!! I cannot recall the title but it was a short story.
I watched the trailer of "The Leap Years" (its a local movie production & I don't think it will be showing in Italy or too far from Singapore) and thought it looked promising (almost like P.S. I Love You). Its about a girl and guy promising to meet each other every February 29th. There are also scenes of where this girl, in tears, ran in the rain, with her wedding dress. And it asks... will you wait 12 years for your love?
Btw, P.S. I Love You is by an Irish author, Cecilia Ahern. This book is made into a movie as well. I enjoyed the movie but I like the book better.