An important topic raised, though some points seem strange to me (e.g., kindergarten, really?).
As for myself, I wake up around 4–5 am and work until 7–8 am, when my family wakes up (my son is 3.7, but it’s been like this ever since his birth). Until 10 am, I’m with them, when I take another 2–3 hours of work (from home, while being in direct proximity and availability for them). Then I take a nap (or “the silent hour,” as we call it in Russia). In the afternoon I work for another 2–3 hours (in the same mode), and after 6 pm I’m free and dedicated to the family.