All new memberships are 12-months in duration based upon the month in which you join. For example, you purchased your membership 8/12/2018. Your membership effective dates would be 8/1/2018-7/31/2019. Membership start dates always begin from the first day of the month until the last day of the month before.
Your membership expiration date can be found under My Account. You must be logged onto the site in order to access this information.