The chances are that you are going to be held for the one year period under the lease. A court would probably order that the date be amended to the correct one year period end date. If you have taken possession of the leased premises, you will have to comply with the lease, or you should expect the landlord to enforce his or her remedies, if you do not.
Are you going to testify in court that you intended to rent the house for only one day? Since you will not be lying in court, it is easily verifiable that you and the landlord agreed to a one year lease. The landlord merely "put the wrong ending year". Contracts are generally not void for mere writing errors.
You can review your specific facts with your attorney to find out your legal options.
Perhaps there are something in your agreement or rental that provides bases for you to leave early.
Also, perhaps your landlord is also looking for ways to get you out of the rental. If you discuss the early termination with the landlord, perhaps the two of you can agree to the early termination.