Tracking Labels: How do I determine the date of production?
CPSC’s tracking label guidance gives you some flexibility in determining your “date of production.” You can use a range of dates, or the date of final assembly. The purpose of the date of production is to help you be able to identify your product in the event of a recall.
You do not have to put the date of production on your product if you use a batch number that you can use to look up the date of production in your own spreadsheet or database. In this case, the batch number functions as a “mark” that makes the date “ascertainable.”