04:00 is better than 04:30 because I get started before sunrise. At the Philippines’ latitude and longitude, sunrise is closer to 05:00 during the Summer and closer to 06:00 in the later months. It’s also quieter since traffic kicks up towards six o’clock.
Morning walks in my enclave is better when it’s early risers, other walkers (dog walking or just walking), runners, bikers, night security guards shaking off the rust with coffee, construction workings on the way to their job sites, and so on.
Each day starts when it starts. When it starts is something you can leave your internal clock or insist that you get up at a prescribed time. I think we all have an internal clock, it's a matter of how we use it.
For a morning person like me — or maybe it’s just me — it’s of paramount importance what time I get up and start the day. It starts with ablutions and morning journal where things just get onto the page with a notebook and a pen.