What is the benefit / purpose to "Mark Day Complete"?

I have been using Cronometer for about a year. I used my previous log religiously, once going 400 days without missing (that is, logging food is not a pipe dream for me). I switched to Cronometer because of its efficient food logging process.

While I have found that always logging on the same day is helpful—as food consumption memory fades amazingly quickly—I sometimes finish up the previous day's dinner or snacks while starting the next day. I cannot say how frequently I do that but it is fairly common.

Thus I am scratching my head to determine the value of the Mark Day Complete button.

I have never marked a day complete in the year+ I've been using Cronometer. Should I?

Answers