This question must have gotten lost in it's original thread, since it wasn't answered.
When are the puzzles locked? There are a number due to end on June 17th. "June 17th" is pretty vague.
Is it 12:01 AM? 11:59:59 PM? What time zone? Are they automatically locked, or is this more human intervention?
It would seem unfair if people quit working on a puzzle expecting it to be closed, and it's allowed to run on for most of a another day.