performance - Storing DateTime field in lucene document -

What is the best way to add date fields to a document (I just need YYYYMMDD)

What is the best way of querying the date field

I am creating the date fields as the following

  newDoc.Add (new field ("Newsday", " , Field.store.Yes, Field.Index.NOT_ANALYZED_NO_NORMS));  

But it slows down searches while adding criteria in this area. What should I do for this area. ???

I think you should have a need to use it, is required.