It is worth highlighting the blog post we made recently regarding the beta below.

In preparation for the launch of Diablo III on Tuesday, May 15, the beta servers will be brought offline on Tuesday, May 1. At that time, all beta accounts and character information will be reset. Leading up to Diablo's May 15 launch date, players will only be able to create comments and forum posts on the official Diablo III community site if they have pre-purchased Diablo III or have a StarCraft II or an active World of Warcraft game license attached to their Battle.net account. In the meantime, we encourage everyone to stay tuned to this website for exciting news and updates regarding the upcoming release.

Also news regarding local timings on release day should be up by the end of the week.