Bungie says it ends on the 27th. So... I'm guessing that means 12:00 AM PDT (or 3:00 AM EST)? If that's so, we got less than four hours of Beta left. Some clarification would be nice.
It is scheduled to end on the 27th, as in the night of the 27th, so you still have a full day. But if read the most recent weekly update from deej you would have seen that they are implying we will have a bit more time than that. So just like at the end of the alpha, they will probably give us a day or two extra to enjoy the beta