what is ‘the evening of the previous day’? Despite the view of some commentators that this should be interpreted as beginning only at 1400 hours (2 pm) on that day, it is the firm view of this commentary that the evening of the previous day begins at midday (12 noon) on that day itself. In some dioceses there is a local regulation to the effect that the so-called vigil or anticipated Mass may not be celebrated before, say, 5 pm or 6 pm: this is normally for pastoral reasons, e.g. to facilitate weddings or funerals in parish or other churches. Those regulations do not in any way concern the time prescribed for fulfilling the obligation to assist at Mass: thus e.g. if in such a diocese a person were to attend a nuptial Mass in the early afternoon on a Saturday, that person would thereby have fulfilled the obligation of #1 of this canon. When a vigil Mass properly so called is in fact celebrated ‘on the evening of the previous day’, it is to be the Mass liturgically proper to the following day, implying a homily, prayers of the faithful, etc. It is to be noted, however, that when a Sunday and another holyday of obligation occur on two successive days, the assistance at no more than an evening Mass on the first of two such days does not fulfill the dual obligation.