The word "datemark" is often used to define a label or stamp indicating the date of manufacture or packaging of a product. However, there are various synonyms that can be used to describe this term. One such word is "date code", which refers to a code or label imprinted on an item that indicates the date of production. Another synonym for "datemark" is "production date", which represents the day, month and year when a product was manufactured. "Batch code" is another term used to describe a datemark, typically used in the food and pharmaceutical industries to identify a batch of products produced at the same time.