I wouldn't say their common here but they're not rare either. I know of several shootout (collection of games - not a tournament) type events where Sunday was day two of a two day lineup.
I will say this, when I was the asst varsity baseball coach we did practice on Sunday evenings however nothing would piss us off more than sometimes seeing the best weather day of the week go by with not being able to play. Which, especially with baseball, to see the calendar switch from may to june and all of the sudden Sunday was no big deal to play on. Similar to how when the HS bball season is over, rec and aau starts up and its no big deal there either.
It may have started off as a church thing but I would put money on it that it has to do more with administrators not wanting to "work" on those days. If you asked the players and coaches more than likely they wouldn't care. And as officials, if you didn't want to work then just block them out.
I've never heard about Wed's being taboo...is that a feeble thing?
