Expiresdate

expiresDate is a field or label used in software systems to indicate the calendar date and time at which a resource, entitlement, or credential ceases to be valid. It denotes the moment when an item should be considered expired and no longer usable.

Typical formats for expiresDate include ISO 8601 date-time strings (for example, 2025-12-31T23:59:59Z) or numeric timestamps such as Unix epoch seconds or milliseconds. Best practice is to store expiresDate in a consistent time zone, preferably UTC, and to include the time component to avoid ambiguity. If only a date is available, systems should document how to interpret the absence of a time component.

Common usage contexts include API tokens and sessions, software licenses, subscriptions, access coupons, and cached data. Validation logic usually checks the current time against expiresDate; if the current moment is on or after expiresDate, the item is considered expired and access or validity is revoked. Some systems distinguish between a grace period or renewal process, where items may be extended before expiration.

Semantics regarding inclusivity vary by implementation. In many designs, an item is valid strictly before expiresDate and invalid at or after that moment. Clear documentation of these rules helps prevent off-by-one errors and security gaps.

Key considerations include ensuring consistent time references across distributed components, handling missing or malformed expiresDate values gracefully, and updating or renewing items before expiration when appropriate. See also expiration, time-to-live, and renewal processes.