Date the content expires and is no longer useful or available. For example a [VideoObject](https://schema.org/VideoObject) or [NewsArticle](https://schema.org/NewsArticle) whose availability or relevance is time-limited, a [ClaimReview](https://schema.org/ClaimReview) fact check whose publisher wants to indicate that it may no longer be relevant (or helpful to highlight) after some date, or a [Certification](https://schema.org/Certification) the validity has expired.

The date on which the CreativeWork was created or the item was added to a DataFeed.

Date of first publication or broadcast. For example the date a [CreativeWork](https://schema.org/CreativeWork) was broadcast or a [Certification](https://schema.org/Certification) was issued.

The date when the item becomes valid.

The date when the item is no longer valid.

The date on which the CreativeWork was most recently modified or when the item's entry was modified within a DataFeed.

The end date and time of the item (in [ISO 8601 date format](http://en.wikipedia.org/wiki/ISO_8601)).

The start date and time of the item (in [ISO 8601 date format](http://en.wikipedia.org/wiki/ISO_8601)).

The end of the availability of the product or service included in the offer.

The beginning of the availability of the product or service included in the offer.

The date after when the item is not valid. For example the end of an offer, salary period, or a period of opening hours.

Used in conjunction with eventStatus for rescheduled or cancelled events. This property contains the previously scheduled start date. For rescheduled events, the startDate property should be used for the newly scheduled start date. In the (rare) case of an event that has been postponed and rescheduled multiple times, this field may be repeated.

The date the invoice is scheduled to be paid.

Publication date of an online listing.

Date (including time if available) when this media object was uploaded to this site.

Date on which this guideline's recommendation was made.

The date after which the price is no longer available.

Date order was placed.

The date that this organization was dissolved.

The date that this organization was founded.

The earliest date the package may arrive.

The latest date the package may arrive.

Date of birth.

Date of death.