I just finished reading Dr. Greger’s “How Not to Diet” book. He also talks about the Circadian rhythm of the body but he says that the research indicates that for lowering cholesterol it is important to eat breakfast, and therefore, starting the TRF earlier: “Does skipping breakfast lead to higher cholesterol, for example? Yes, within just two weeks, there was a significant rise in bad LDL cholesterol in those randomized to skip breakfast. The Israeli 700/500/200 study found that the triglycerides of the king-prince-pauper group got significantly better, dropping 60 points, while those of the pauper-prince-king group got significantly worse, rising 26 points.” (Taken from How Not to Diet by Dr. Michael Greger, page 328).
The king-prince-pauper reference is to a style of eating where one eats the majority of their calories for breakfast, a smaller lunch, and a very, very light dinner and ending, like you said, all food and drink consumption 3–4 hours prior to going to bed.
I know Dr. Satchin Panda is the premiere expert on TRF but maybe there’s other information out there people need to know in order to decide when to start their feeding window.