I seem to be losing track of time.
No, delete that. I have lost track of time.
Once, I think it was recently but I'm not sure, I could tell the time without a watch. My friends thought it fun to ask me the time and for me to be, usually, within a minute or two of correct.
Yesterday, I had to ask someone what day it was. Not date... day.
Today, I noticed it is January. That means that, somewhere, in the recent past, there has been a Christmas and a New Year and I haven't registered either.