What do you mean by “programming”? Were you using alarms? Te way to set alarms has been changed: https://support.sonos.com/article/set-an-alarm-on-sonos

before I answer your question, I need to ask another one: I used to program my Sonos system from my PC. Is that still possible, or is it only through an app on my phone now? 

I clicked on the link you sent, and every entry had the word “app.” I prefer to use my PC, rather than an app.

What is an “alarm?”

when I say ”progarmming,” I could choose various radio staions to play based on the schedule I set. For example, I could play ABC Jazz station from 7:15 am o07:15] to 9:15 am :09:15] and it would go off and on according to the setting. I was able to program it for the whole week. All work was done on my PC. I can’t find the tab to start scheduling Sonos. That’s what I’m looking for.

Can you help me find it? Thanks!

Try this link, since you’re from the US:

https://support.sonos.com/en-us/article/set-an-alarm-on-sonos

In order to help you ‘find’ it on the PC ‘app/controller’, we’ll need to know which version you’re using, as they’re different on S1 and S2 (although they shouldn’t have changed position in S1).

What you’re calling ‘programming’, most people would call ‘alarms’, based on the labeling that Sonos uses for the function.