How do read crest white strips expiration code?

To read Crest Whitestrips' expiration code:

- Locate the 6-digit code printed above the lot number on the product's outer carton's bottom.

- The first or the fourth digits signify the expiration year. If the first character signifies the expiry year, the fourth character means year of production, vice versa.

- The three-digit code next to this tells in which week of that year it has been manufactured.