The deadline is November 1 for formal and informal education institutions and organizations to submit proposals to host an Amateur Radio contact with an ISS crew member on board the ISS.

ARISS anticipates that contacts will take place between July 1 and December 31, 2017. Crew scheduling and ISS orbits determine contact dates. To maximize these radio contact opportunities, ARISS is looking for organizations that will draw large numbers of participants and integrate the ham radio contact into a well-developed education plan. -- Thanks to ARISS