Property:Modification date

Modification date is a special property in SMW with a built-in meaning: it has a fixed value that corresponds to the date of the last modification of each page. This special property is available since 1.4.0 SMW 1.4.0.

This property can be used to refer to page modification dates in inline queries, where it can be used like any other property of datatype Date. This special property should never be set manually. SMW will take care of updating its value.

The time stored in this property is based on the internal time reckoning of the wiki server, and it may not agree with the time in the timezone of a certain user. Since this value is stored in the database, it is not adjusted based on the current user's timezone preferences.

See http://semantic-mediawiki.org/wiki/Property:Modification_date