It depends on the contract term.
With a month-to-month membership we require at least one full calendar month notice. If you give notice during the course of a month, your cancellation will take effect on the last day of the following month.
With a 12-months fixed term contract you need to give at least one full calendar month notice prior to the end date of the contract. If your notice is shorter than one month prior to the end date – the contact will be cancelled on the last day of the month following the end date.