Monday is day 17. Do I do Lock Down end up day 17, beginning of day 18 or end of day 18? Last hatch I had an early hatcher. Piped day 19 and hatched 4am day 20. I set the eggs I set the midnight, night of the 11th. So day one was technically the 13th. So would I start lockdown Monday or Tuesday this week? So confused. These are for Chicken Silkie bantam eggs.