h-event
From Just Solve the File Format Problem
h-event (formerly hCalendar) is one of several "microformats" released via the microformats.org site and community, intended for the representation of information in a manner that is human-readable but can still be processed by machines. The name change was done with the introduction of the updated microformats2 specs.
The format encodes all the same fields as the iCalendar format in the form of HTML or XML. Thus, it can be embedded in web pages and be readable this way (and styled via CSS), but has a standardized structure that can easily be converted mechanically to and from iCalendar and other calendar formats such as vCalendar.
