Ok. I think I figured it out.
I thought that if I just kept scrolling down the list It would show me the following days. But it seems I have to select the "day / Date" at the top of the list to get further than 24 hours.
If you are showing "All Channels" the list of programs can get quite long and unwieldy. That is why just 24 hours is shown, and you can use the Day and Time controls to change the start time of that 24 hours.
If you are looking for something specific, use the Search box in the top right corner of MC Standard View, and the results will include all available days in the EPG. For example, put "News" in the search box and I'm sure you will see multiple days of results.