I believe it would be 10. A couple years ago I made ADRs at PF for 8:30 p.m. when they closed at 8:30. I was trying to get in the latest possible to take advantage of CM discount (for dining after 8:30 p.m.) Unfortunately, it didn't work and we paid full price, oh well, we tried.
Also last Sept. we had ADRs at 'Ohana breakfast at 11 a.m. (closing time) on our last day. This worked out great as we took our time eating, and visiting with the characters, who continued to come around the entire time we were there. I think we saw them all at least 3, or more, times.