Good plan. Pers-kon-ally, I don't care that much, but I do like a longer evening time since we like to go boating at 9pm when the sun is just setting on Lake James in NC.
We work on the cold/heat factor. In the winter we show up as late as 9am. In the summer we start as early as possible even if it's still dark out. Being a carpenter, you can't really fire up the tools at 5am or you'll P.O. some neighbors.