Since the 13th century, both Mary and the month of May were greeted, welcomed and celebrated on specific days of the month. Later, the whole month of May became dedicated to Mary. Each day was organized with special devotions to Mary, a custom originating in Italy. Thus we see over time that people were able to pass from a pagan to a Christian mindset through a profound change in their beliefs and their system of moral values without losing vital contact with their old social tradition, which was sublimated and transformed, but not destroyed or lost. May devotions spread widely during the 19th century, a century well known for its monthly devotions (the Sacred Heart of Jesus in June; the Rosary in October).
Here are links to Marian prayers and activities:
Know of my continued prayers for you as we keep the faith,
David J. Conrad