Each product’s batch date is heat-stamped on our label on the bottom of the container, either above or below the barcode. Most of our products use the Julian date for batch date, which is the production date. This is considered to be the number of elapsed days since the beginning of a particular year. The first two digits of the code are the last two digits of the year, followed by the number of elapsed days. For example, the Julian date in 5-digit format for the calendar date of 06/09/2020 would be 20161. On some of our products, the batch date is listed in the format using the first digit for the year (for example, 2020 = 0), the following two digits are the month (for example, June = 06), followed by the last two digits representing the day. The date of 06/09/2020 in this format is listed as 00609. The expiration date is two years after the stamped batch date.