Epiphany 7th Jan
Ascension 9th May
St Peter & St Paul 30th June
Assumption 15th Aug
All Saints 1st November
Nativity of the Lord 25th December
There are only six Holy Days of Obligation which may be celebrated on weekdays. In addition to Christmas Day, these are Epiphany , Ascension , St Peter & St Paul , the Assumption of Our Lady and All Saints. When these days fall on a Saturday or a Monday, then the day is transferred to the nearest Sunday. This rule does not apply to Christmas Day.
Please note that other holy days, such as Ash Wednesday, Good Friday, the Immaculate Conception are not of obligation. In terms of mass times, Ash Wednesday is treated as if it were a Holy Day.