Items marked with expiration dates consisting of only a month and year expire on what day?

Items marked with expiration dates that consist of only a month and year expire on the last day of the listed month. This means that if a product is marked with an expiration date of, for example, October 2023, it is considered good until the very last moment of that month, specifically until October 31, 2023, at 11:59 PM.

This approach helps to prevent misinterpretation of expiration dates, ensuring that consumers understand they have the entire month to utilize the product before it is deemed expired. It aligns with standard practices in inventory management and helps mitigate waste by allowing for maximum usability of the items until the end of the specified month.

Other choices do not align with this standard understanding; the first day of the month would imply the item is already expired on that date, which is not how expiration dates are conventionally interpreted. The date listed might lead to confusion since only month and year are provided, and a month prior would suggest an inaccurate expiration timeframe.