If the other side has violated the agreement by missing closing days *without you consenting to the delay*, then you could potentially sue them for any costs you thereby incur due to their breach or failure to make the agreed-upon closing date, such as additional storage and moving costs. But if you agreed to the changes in the date(s), you have no recourse, because the dates were delayed with your concurrence.If you need a firm date now, send a letter, sent some way or ways you can prove delivery, to the buyer stating that "time is of the essence," receiting the history of delays, and setting a new date by or on which you must close; in the letter, also clearly state the costs and other issues which will occur if you do not close by that date and state you will hold the other side liable for your costs if they do not close as scheduled. If after that they still don't close as scheduled, you will at least have laid groundwork supporting your lawsuit; and hopefully, the letter will prompt them to finally close.Needless to say, if you need this to be a rock solid date, do *not* agree to any further delays, for any reason.