How cats tell time is very interesting. Wherever she might be Willow shows up every night precisely at 10:00 pm expecting her night time snack to be distributed. There are no tells from me, I may not have turned off the TV or risen from my chair. She just knows what time it is.Stopped napping at precisely 8PM to remind to fill his feeder tray. How does he do it? He has no wristwatch. I feel grateful to take care of my elders, and routine is very, very important to him. Appreciate each day I have left with my old cat. It is precious.