This year the Solemnity of St Mungo (also known as St Kentigern) falls on Sunday 13 January. As patron saint of the Archdiocese of Glasgow, his Solemnity will be celebrated in churches throughout the archdiocese rather than the Feast of the Baptism of the Lord.
My attention was drawn in particular to the music being prepared for the 11am Mass this coming Sunday in St Columba's church in Hopehill Road, Glasgow. The church is under the care of the Dominican friars and its choir is conducted by James MacMillan CBE.
On this occasion the choir will be joined by Canty, Scotland's only professional medieval music group. They will perform chant from the Office for St Kentigern, found in the 13th-century 'Sprouston Breviary'. In addition, a new setting by MacMillan of the psalm will be sung, as well as his 'St Anne's Mass'.
More information from the choir's website here.