Kladana is using the FIFO method (first in, first out) by default. It means that products that were purchased first will be sold first.
FIFO is used to calculate the cost of goods (U. cost) in transactions.
Also, once you create a Shipment, the system reduces stock by the number of products that were purchased in the first place.
If you want to physically track product’s dates you can use batches with expiry dates and bins storage. It will give you the option to find products with a specific date.
To do that, you should name the batch with the date of receiving and specify bin for the product. When you will do shipment you can find this specific product in that bin.