The NSF Early CAREER program announcement is up and the solicitation can be found here. The dates for the 2017 submission have been posted and are as follows:
Full Proposal Deadline Date
July 19, 2017
July 19, 2017
Third Wednesday in July, Annually Thereafter
-- for BIO, CISE, EHR
July 20, 2017
Third Thursday in July, Annually Thereafter
-- for ENG
July 21, 2017
Third Friday in July, Annually Thereafter
-- for GEO, MPS, SBE
Now is the time to be contacting prospective program officers. The official division contacts can be found here