I've heard that expression all my life. It is basically a cute way of saying that members of the Church are chronically late. I began to wonder if it is just us, so, with the power of Google, I ran some searches to see.
This was one of those Ultra-Mormon weeks where everyone in our family had multiple church activities to attend. There was something every day of the week, except Monday. I was standing with a friend, waiting for one of them to start and noticed that hardly anyone was there. He shrugged his shoulders and said, "Mormon Standard Time."
Comments and feedback can be sent to email@example.com