Our Haiku teas do not have an expiration date but do have a best-before date. This is 2 years after the date of manufacture. The manufacture date is the first 5 numbers in a code printed in black ink on the side of the box. The first 2 numbers are the year, and the subsequent 3 numbers are the Julian date, which refers to the number of days in the year rather than day of the month. For example, a code with 21001 was manufactured on January 1st, 2021, while a code with 21365 was manufactured on December 31st, 2021. If your tea is within 2 years of its manufacture date, you can be assured you are getting the best representation of the product.