The phrase “valid through” usually refers to an offer or agreement, and means that after a given period (for example, “through the end of the year”) the offer …

What is valid thru debit card?

On your debit card, there is a date that is listed next to the phrase “valid thru.” This date is the month and year (MM/YY) your debit card is valid until—in other words, the card expires after that day in that month. You should receive a new debit card in the mail from the bank before your current card expires.

What is valid thru MM YY?

The abbreviation MM/YYYY on a credit or debit card refers to the two-digit month and four-digit year of the card’s expiration date. If this date has passed, you won’t be able to use your card, so make sure your bank sends you a new one before your old card expires.

“Coupon valid through 2021” implies that it goes until the close of business on the last business day of 2021. Since Dec 31, 2021 is a Friday, and not a holiday in the US, this would imply the validity runs through the close of business on Dec 31. (But note that many businesses close early on New Year’s Eve.)