mutt - howto save all incomming mails from a month
 

Hi,

Once every month or so, mutt has received about 500 emails and are getting a bit slow when starting.
Thus, I use the 's' button on about 400 emails to get them saved, but away from my inbox.

Now, I would like to simply say:
Mutt, save all emails from date1-date2 in file date1date2

Can this be done, or what is the way to quickly do something with a similar effect ?

Thanks a bunch for reading this !

Please assist :-)