You can do a delayed closing, but you're not getting paid until it closes, and any halfway intelligent buyer isn't going to send their money until the contract is ready to close. I recall a number of contracts listed this past June with late December closings, so over 6 months from the date of listing. Of course, a delayed closing is going to further limit your potential buyer pool, as many buyers won't be interested in waiting that long to get their points. If OP cannot cancel their reservation, I think waiting to list the contract would be a better course of action, particularly since it is a large contract and the potential buyer pool will already be more limited.