We just introduced a new meta field to records which represents the first time a record gets published: perfect to use in blogs as the publication date of an article, for example.

You can fetch, filter and order records using _firstPublishedAt on our GraphQL Content Delivery API:

{
  allBlogPosts(orderBy: [_firstPublishedAt_DESC]) {
    title
    slug
    author { name }
    _firstPublishedAt
  }
}

The meta field is also present in our CMA, and in the administrative interface: