I once botched an alpine start by getting my buddy's truck stuck in the snow, took two hours to dig it out and once we were on our way, the sun was rising.
Usually when I leave that early (4am) for a hike it takes days of prep to be able to get up early enough.
The 4pm depart time though can be a bit fucky for time depending on the trail I head to. I didn't set foot on the trail until about 7:30 and didn't get home until about 3am.
I got home at 3 basically because I learned on the trail that wolves had moved back into the area for the first time in decades. So my hike wasn't as long or stress free as I would have liked.
Good news is I got out only emotionally shaken not physically gnawed on.