The National Science Foundation (NSF) has revised submission due dates for programs that fall between October 1st and October 25th, 2013, due to the Federal government shutdown.
The new proposal submission deadlines fall between October 23rd and November 20th, 2013. See the Revised Proposal Due Date Listing for full details. Questions regarding the specific funding opportunity should be directed to the cognizant NSF program officer(s) identified in the funding opportunity.
More NSF information is available on the NSF Resumption of Operations page.