I know that rss feeds is news...Is it possible to get rss feed's from yesterday or day before yesterday...(more exactly, archive of rss feeds).
No, the server decides what posts to feed you.
Your RSS server might be configured to let you have more posts by supplying arguments to the feed url - but thats unlikely.
来源：https://stackoverflow.com/questions/2123918/is-it-possible-to-get-rss-archive