The month of May is dedicated to The Blessed Virgin Mary. The first 20 days fall within the liturgical season of Easter, which is represented by the liturgical color white — the color of light, a symbol of joy, purity and innocence (absolute or restored). The remainder of the month (beginning the Monday after Pentecost) is in Ordinary Time which is represented by the liturgical color green. This symbol of hope is the color of the sprouting seed and arouses in the faithful the hope of reaping the eternal harvest of heaven, especially the hope of a glorious resurrection.
The Holy Father's Intentions for the Month of May 2018
Evangelization: The Mission of the Laity
That the lay faithful may fulfil their specific mission, by responding with creativity to the challenges that face the world today.