The Financial Industry Regulatory Authority, Inc. is proposing to amend FINRA Rule 2360(b)(23) to harmonize the expiration date of standardized equity options with the rules of The Options Clearing Corporation (OCC) and the options exchanges. Specifically, the proposed rule amendment will change the expiration date for most standardized options contracts from the Saturday following the third Friday of the expiration month to the third Friday of the expiration month. The revised expiration date will apply to (i) special procedures for the exercise of standardized equity options, (ii) to the exercise cut-off time and (iii) in the event that the OCC or national options exchange provides advance notice modifying the time for the close of trading in standardized equity options. 

More information on the proposed rule change to FINRA Rule 2360 is available here.