Quick! Think about what you were eating for lunch a week ago on Monday. I bet you can’t remember. That’s my point. Time tracking after-the-fact is dumb and totally inaccurate.
At best, you’ll be able to guess about the chunks of time, but never the detail. You’ll forget all of the little things you did, and you’ll be forced to fudge the numbers.
Use your brain, use a stopwatch.