Marian hymns

In Paul Turner's Blog by Paul Turner

Q: I was wondering if there are any guidelines for using Marian hymns during the liturgy in May.  Is there a part of the Mass where it is more appropriate to have a Marian hymn?

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A: There are no specific liturgical guidelines over Marian hymns in May. The rubrics permit them at almost any time—entrance, preparation of the gifts, communion and closing. But the music for the entrance and communion is ideally suited to the liturgical day, whereas the other hymns enjoy even more flexibility.