Maintenance Times (don't make sense to me)

[Akuha]

No, really I'm curious. Since all their times are given in PDT, I'm assuming SE sets up shop somewhere on the west coast (likely Cali)? If that's the case there's no massive intercontinental time zone difference to wade around, so why do they put maintenance times where they do, rather than in the lowest traffic hours of the day when people are usually at work/school? Yes, I am aware other countries around the world play as well, Japan being one of them. I am also aware that they have split maint times before to accommodate that time difference by performing maint on NA and JP worlds at different times.