New Beginnings 2

Everything here is in flower except for granddaddy, granddaddy’s still in veg til it gets bigger but anyways I normally don’t start counting days in flower until I see the white hairs come out to form the bud but they have been under 12/12 for about 13 days now. Quick question when do y’all start counting flower soon as you flip your lights to 12/12 or what? Have I been doing it wrong this whole time?