Valid thru什麼意思

"Valid thru" is an abbreviation often used in the context of expiration dates, typically found on membership cards, passes, tickets, or any document with a limited period of validity. The term "thru" is a non-standard spelling of "through," which is used in American English to mean "until" or "up to and including."

So, "valid thru" means "valid until" or "valid up to and including the specified date." For example, if a ticket is valid thru June 30, 2023, it can be used until midnight on June 30th, but it would not be valid from July 1st onwards.

This phrase is commonly seen in the United States and is part of American English usage. In other English-speaking countries, the phrase might be written as "valid until" or "valid up to" followed by the date.