I’m sorry you are going through this. My MIL had dementia, not Alzheimers. One of the 1st symptoms was the loss of the ability to tell time, like morning from night. We had her in an Assisted living facility and she probably did ok for about a year with that, but eventually had to move to a nursing home and then Hospice.
If your mom has Alzheimers, I believe there are drugs that could show down the progression.
Thank you so much for sharing about your MIL. I am beginning to realize how difficult is this disease - for everyone.