 Additionally, members should participate yearly in a spiritual retreat; a three-week seminar every year is obligatory for numeraries, and a one-week seminar for supernumeraries.Also members are expected to make a day-trip pilgrimage where they recite 3 5-decade rosaries on the month of May in honor of Mary.As a spirituality for ordinary people, Opus Dei focuses on performing sacrifices pertaining to normal duties and to its emphasis on charity and cheerfulness.