Holy Days of Obligation are the days other than Sundays when Catholics are obligated to attend Mass.  Below are the Holy Days of Obligation in Scotland:

• Thursday 26^th May – The Solemnity of the Ascension
• Wednesday 29^th June (see note below) – The Solemnity of St. Peter and St. Paul, Apostles
• Sunday 14^th August – The Solemnity of the Assumption of the Blessed Virgin Mary
• Tuesday 1^st November – The Solemnity of All Saints
• Sunday 25^th December – The Solemnity of the Nativity of Our Lord Jesus Christ

Note: If St Peter and St Paul or the Assumption fall on a Monday or a Saturday, the day of obligation will be celebrated on a Sunday.  If All Saints falls on a Saturday then the day obligation will be Sunday and All Souls will be on the Monday.  If All Saints falls on a Monday then that day is a day of obligation.