This is correct. To make the calculation, you look at the sign-in for each fdp (basically duty day, except for DH only days). From that point, you look back 168 hours and have to find 30 hours free from duty.

In your case, you look back on the morning of the 7th and would find your rest on the 31st and 1st...

As Goggles pointed out a few pages back, the key for both the 30 hour and 10 hour rest requirements is that you look back and find the rest PRIOR to starting the fdp. You don't have to look back from the end of the period like we used to with Whitlow.

^^This is a big difference, and one that many guys aren't grasping intuitively^^

I was so boggled by 117 at the beginning that I have decided to put together an app that specifically handles Delta pilot 117 calculations (each carrier can have exemptions and unique FRMS' so a generic 117 app isn't very useful.) I'm working to have it ready by January 1st. If you have any functionality that you want included, let me know....