Revision date / time
On page 218 of the English Handbook v3.5 PDF we see the following (and it appears as a tooltip in Format>Styles>Header,Footer when hovering any Header or Footer field:
So I've used the $M and $m macros for revision date and revision time stamps.
I expected that $M (Modification date) and $m (modification time) would update if the score was changed and if the score was saved. But after an initial mod triggers it active $m updates every minute ..., even when no further modification has occurred! To be clear, on opening the score the Modification Time remains fixed until the first modification, but then it updates every minute.
So, in my understanding of the term, it does not provide a true modification or revision stamp.
I discovered this after I began sharing some of my scores with students. Since we Musescorists can't "lock" scores to prevent accidental modification, I've asked the students to report the Modification info when it appears that they've inadvertently made a change. That's when I realized that, on any opened and modified score the Modification Time always displays "now," plus or minus one minute.
If $M and $m are working according to design, and always showing the current time:
a) I'd suggest giving them a better name
b) I'd like to request true Revision Date and Revision Time macros that update on modification and Save.
Of course, I can always explicitly at a modification date and time in literal footer text, but I'd rather rely on something automatic.