What's your pager rotation like? I want to say you have follows-the-sun, and so your on-call shifts are 12-hours long and you swap with a team on the other side of the world from you so you can get said sleep, but I don't want to just assume that.
Less "on" hours then? Even Google has diurnal patterns when there's a lower amount of traffic simply due to the fact that humans are unevenly distributed across the Earth's surface. And Google does code freezes for the holidays where they don't deploy at all.
