7-day processing refers to the daily processing done on your credit union data every night by the Operations department.  End-of-day (EOD) and beginning-of-day (BOD) will be run on all seven days of the week.
 
It is not to be confused with having the teller line open on Sundays.

Terminology:
  1. Seven-Day Processing: CU*Answers processes your credit union’s nightly cycle seven days a week in accordance with our 24/7 approach to core processing.
  2. Sunday Open Branch: The CU staffs the lobby for business and performs regular daily services for members. CU*Answers requires 30 days lead-time to prepare this activity for your credit union. We have accommodated credit unions with Sunday Open Branch activity since 2013.