I like consistency but don’t exactly force it. My only hard constraints are a) having one sitting in a calendar day – no matter how long it lasts and how long I fasted before –, and b) maintaining a monthly average ratio of at least 20:4. So in practice I’ll eat when it best suits me and just update a moving average in my spreadsheet when I’m done. The end result over time typically converges to ~22:2, even if day-to-day things sometimes appear random; e.g. a 16:1 (cycles don’t always neatly last 24 hours), followed by a 29:3, followed by a 22:1 (total = 72 hours, average over 3 cycles = 22.33 : 1.67).