How to search on date ranges using apachesolr module? I have a drupal site which have some events.

I am using apachesolr module for searching the site. Currently two fields are used for searching "keywords" and "location". Now I want to add the date field and when I click the search button it also query the search based on the date selected in the date field.

Suppose If I selected a 10/01/2011(m/d/Y) in the date field It should display the events with date 10/01/2011 or greater.

Any Idea?
Take a look at the Lucene search syntax, for dates use a filter query like
created:[2011-10-01T23:59:59Z TO 2011-10-31T14:11:00Z]