Most of them look backwards. The date format is' Day / month / year ', or' month / year ', or' Day / year ', and some are looking forward. The date format is' year / month / day', depending on where it is produced. For example, the package can be marked as mfg 20102020 or 20100115. What about the date after mfg? Mfg means production date. Correspondingly, exp on the packing box indicates the expiration date.
Some mfgs also mark the specific production time, such as mfg180821 08:10, indicating that the production date is August 18, 2021, 8:10.
The production date refers to the date and time when the goods have completed all processes on the production line and become finished products that can be sold on the market after inspection and packaging. （mfgHouMianDeRiJiZenMeKan）