On average, the online pre-Cana video courses take about 10 hours to complete; the NFP video courses take about 5 hours to complete. The in-person pre-Cana retreat will run from Friday evening through Saturday evening, with overnight accommodation at the retreat house, unless otherwise stated. The in-person NFP seminar is scheduled to run for 4 hours. If a couple chooses to do a full course of NFP for the NFP certificate, that full course takes between three to six months to complete. For couples who are already civilly wedded and choose the Worldwide Marriage Encounter weekend to fulfill their pre-Cana certificate, the WWME weekends are two-night retreats.