I would submit that we have no universally proper vocabulary for our now-regular Saturday-evening-Masses-with-Sunday-formularies, since both vigil and anticipated fail in certain respects. On the one hand, a vigil Mass is supposed to have different Mass propers from the Mass of the liturgical day itself - the Missal provides 8 of these vigils (though all but the Easter Vigil are for optional use). So viewed from this aspect our Sunday-Mass-on-Saturday is certainly not a vigil. But neither is it (normally) anticipated, if we consider that the liturgical Sunday usually begins with its first Vespers Saturday evening. That being said, there are occasional instances in which these Saturday non-vigil Masses are indeed anticipatory, such as in November 2014 when All Souls fell on a Sunday. The instructions from our diocesan worship office were that Masses on the evening of Saturday, Nov 1, were to use the texts of All Souls, since the role of that regularly occurring Mass time was that of, in their terms, anticipated Mass. The liturgical day was All Saints, but we said Mass of All Souls.