Gift Card expiration dates are available only in the PW Gift Cards Pro version.
You can have the system automatically set an expiration date for newly purchased cards by following these steps:
1. Log into your WordPress admin area
2. Click on the Products menu on the left
3. Edit the gift card product
4. On the “Gift Card” tab, look for the “Expires in X days” field
This will change the expiration date for new gift cards, however existing gift cards will not be affected. If you want to change all existing gift cards, see our guide here: Bulk Change Expiration Date