The calendar shows the "starting" day as a Sunday. Is there any way to change it so that Monday becomes the "Starting" day?
Spamming aside
I think this is a very good idea.
As more people adopt Threads, I think you will see this question arise more often.
Culturally, most weeks (I believe) start on Sunday & Monday.
However, we can't forget the Muslim world.
I suspect quite a few are using UBB? (I don't know the stats.)
I believe the Islamic week 'start' is Saturday.
Just a thought.