On Sarum Chant.
To quote from the site:
The Kalendar appearing here contains in the third column the information provided in the printed Sarum Kalendars such as that found at the front of the Breviarium 1531. In the fourth column appears the information found in the Pica which appear scattered throughout the Breviarium. Generally speaking the latter takes precedence over the former where they differ. This Kalendar is provided firstly as a guide to those who wish to follow the Sarum Liturgical Kalendar throughout the course of 2013, and secondly for those who wish to gain an understanding of the nature of a typical Sarum or pre-Tridentine liturgical year. This Kalendar follows the Gregorian or Western calendar.
I haven’t examined the whole thing, but I am dubious about celebrating the feast of the Annunciation (March 25th) on Monday of Holy Week. I would be inclined to transfer the Annunciation to Monday April 8th, immediately following Low Sunday.
The Blue Flower 
”I would be inclined to transfer the Annunciation to Monday April 8th.”
So would I!
I don’t know enough about Sarum Use to comment, but I wouldn’t be amazed if this observance of Annunciation were to have been precisely what they would have done. In the Eastern Orthodox liturgy Annunciation is never transferred, and there are complicated instructions on how to combine Pascha and Annunciation when they fall on the same day. Perhaps Salisbury also considered This feast too important to be moved.
Thank You Father, for presenting the Sarum Kalender in an understandable, concise, and contemporary (for the year 2013) format!
This calendar is not my work. I merely link to it, so I would agree with you in your praise of it.