This prediction of when fish will be most active is uncanny how accurate it is! Try this, fish for a month and write down when your bites occurred. Then come back and correlate your data with the predictions and you will find it is at least 80% or more accurate. The only bad thing is you know if your day will be slow before even getting in the water. I live by these charts for to plan my fishing trips.
Bigfish12445 about Fishing Calendar Pro, v3.01