First of all, the schedule is assuming your taxes from last year are processed by April 15th. Since I'm doing mine today (yes, I know...) hopefully that will be in the nick of time. Then they break it down by direct deposit (starting May 2nd) and paper check (starting May 16th), and finally use the last two digits of your Social Security number.
To get the check, you must file this year (by October 15th)- even if you don't normally meet the filing minimum. Mine is already spent on vacation, even though I thought about saving it. Has anyone else already spent theirs?