I'm US East Coast (effectively, though not formally, remote) and the company--while pretty distributed--tends to be centered on the East Coast timezone. We don't have a lot of people on the West Coast so we mostly schedule morning meetings when we need people in Europe to participate, where we do have a lot of people.

APAC? it's tough. They're on a lot of late night calls though we make do as we have to. (And again, tend to have fairly early AM meetings ET (or late afternoon/evening) if Asia needs to participate.) I'm not in engineering but my guess is that there's a lot less real-time collaboration than with engineering offices/remotes in the US and Europe. One standing meeting I'm in, we alternative between late in the (business) day and early in the (business) day ET.