Not having a Sunday matinee is an anomaly these days as most shows have a Sunday matinee performance. Years ago, Broadway was dark on Sunday; I remember seeing Amadeus during a Sunday matinee in the early 80s, the first time I attended a show on Sunday.(in August, no less). The theater district was like a ghost town and it was pretty eerie. During the time after that, more shows played on Sundays so that by the 90s, it was more the norm.
I actually like when shows perform on Monday evenings. For those of us coming in from New Jersey, there's less traffic coming into the City and parking is cheaper! Recently, Hangmen was dark on Sundays and had Monday evening performances throughout its short run. As someone mentioned, shows tend to be dark on Sundays and play on Monday evenings during previews. In fact, I'll be seeing The Piano Lesson on a Monday evening in early October. I find Sunday evening shows to be rare, but I like them because I can come into the City on one non-work day and see two shows - one toll, one parking fee!
I remember reading some time ago that more shows were reconsidering Wednesday matinees. The reason was that in the past, Sunday matinees were attended by women who didn't hold full time jobs and local high schoolers on field trips. The article stated that with women being in the workforce, there were fewer audience members in demand of Wednesday matinees. That was a while ago, but I haven't seen much of a shift from Wednesday matinees.
After all that, I have no idea why the current typical schedule of Broadway shows is what is it is, lol.