...trouble is that the lowest common denominator voting may not be the optimum time, which should be based on the lowest level of inconvenience for the overall community.
The core community is US-based, so that means EST pm earliest for mid-week auctions. The next core is Euro-based which is 5 hours behind, so the only viable time is really 5pm EST, which is the current schedule. If sufficient demand there might be a case for schedulling an Asian timezone auction to cover India/china/SE Asia markets. This could start 10am EST but would NP admin want to get up that early on a Saturday/Sunday morning?