1 month ago the contract cancellation notice any attention even during the contract period, often unable to work or other reasons, will close the deal.
Do not listen to attention even during the contract period, because, for example, can not be good work, and the notice of January before the contract canceled if any, will be the end of the contract.
In the term of a contract not to listen carefully, because can not work well if the before one month of the contract termination notice, the contract will be terminated.