need feed parameters for wordpress blog feed

Thanks for replying.

But I think my question is not very clear. If I take a rss feed with the extra parameters of date and year like this, http://example.wordpress.com/?feed=rss&monthnum=09&year=2009, I get only 10 feeds items and not the entire months actual items. Also it varies for every wordpress blog. And if I add the date like http://example.wordpress.com/?feed=rss&monthnum=06&year=2009&date=01(upto 30,31), it fetches all the records correctly datewise and so I get it for the entire month. So logically if I fetch for an entire month then I should get all the feed items for the entire month, but that is not happening.

Is there a way I can get it? Or is it that the blogger himself can restrict the feed items to a certain limit or wordpress itself restricts it?

Please let me know. I am unable to figure it out.

Thanks onc eagain.