I flew FCO-CDG-IAD yesterday (June 2). AF 026 was preemptively rescheduled from a 5pm departure to 6:15pm. AF sent notice of the schedule change on June 1. We had an additional 30 minute delay for boarding, with little explanation provided (aircraft was at the gate well before boarding). Fortunately for us, the load was pretty light (maybe 1/2 full), and we were able to depart reasonably on time.