It is significant that before the council, the first Sunday after Easter was known as "Low Sunday," but in the reform afer the council, the Octave of Easter was made a most significant octave; thus the liturgy prescribes that elements from Easter are repeated, including Victimae Paschali laudes and Ite missa est alleluia, alleluia, alleluia.
Yes we sang it at all the Sung Masses throughout the Octave (Tuesday, Friday, Saturday, Sunday). In some years past when the budget allowed it we had Sung Masses every day of the Octave - hopefully next year again.
Our abbey sang it on Easter Sunday and Sunday of the Octave. Throughout the Octave, they alternated between the gradual Haec Dies and the sequence (on the weekday they did one, they did not do the other).
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.