A blogpost contains time- or event-specific content

To handle a topic that is strongly related to a point in time (such as news, an announcement, or event), there is a special kind of page called blogpost.

A blogpost is just a page obsessed with its birthdate

Blogposts can do everything a regular page can. So what's the difference? Blogposts are organized by date and time, which allows them to be accessed using a calendar. Sometimes you'll want to make breaking news more prominent, such as displaying links to the five most recent articles on your home page.