Hi mummies, notice there is a need to do a baby feeding and pooing care log. How long is the duration to maintain the log?

I had a log book on the feeding, diaper changing and poo during the 2nd and 3rd month. During the 1st month, my confinement lady will help to remember the next feed time and next diaper change. We will check with her if he had pooed. During the 2nd month, i am taking care of my lo alone. During sleeptime, my hubby will help me on alternate feed and at the same time change diaper (if needed). We got a bit confused on the last diaper change and feeding time as at any one time, only one of us was awake. Thus we started to keep a logbook on this. We stop having the logbook after 2nd month as we tend to forget to update the logbook and we started to understand my lo milk feed timing at night. My lo is ifc now and the teacher kept a logbook of his feeding, diaper change, poo and sleeping time. I feel that having a logbook is good if you are not the only caregiver as it is easier to manage and observe if your lo is unwell (from his eating/drinking pattern, or sleeping pattern). I will always refer to the logbook and calculate how many hours he slept at ifc. If he slept lesser than usual in ifc, he will tend to eat less for his dinner and sleep earlier. If you are the only one taking care of your lo, logbook would be good if you cannot remember the timings and etc.