On All Souls' day (2 November) the Mass of the octave (or feast) was said after Terce, the Requiem after None. When an additional votive Mass had to be said (for instance for the Forty Hours or for the anniversary of the bishop's consecration or enthronement, etc.)
On doubles, semi-doubles Sundays and during octaves, the conventual Mass was said after Terce, on simples and ferias after Sext, on ferias of Advent and Lent, on Vigils and Ember days after None. There were also occasions on which several conventual Masses are said on the same day.