Release Date
Enter the date the product was originally released by the manufacturer.
Release date is not the date that we started carying the product at Teaching & Learning Stuff.
When a product is revised, update/enter the release date to the revision date.*
The core product needs to fundamentally change to merit an update to our released date. Minor changes (such as updating the package or book cover) probably don't count as a revision.
* If this seems unwise, use your best judgment.
If the month or day is not available, enter January 1st, or use your best guess. Only the month and year are shown to customers.