You do not have the ability to automatically expire a Gift Certificate by date. A Gift Certificate will remain active and available for use until it's redeemed.
To learn how to expire an unused Gift Certificate, go here.
If you're mass expiring Gift Certificates based on date:
- Export your Gift Certificates report to a spreadsheet.
- Open the file in a spreadsheet program, and sort the data by purchase date.
- Redeem each code through the Cash Register.