ARISS will transmit images from Series 31 utilizing the SSTV system on the International Space Station (ISS). This event will run the week of April 12th and utilize the 70 cm band.
SSTV Series 31 images will pay tribute Cosmonautics Day, 100th anniversary of liquid-fueled rockets, the inaugural Space Shuttle launch, and SuitSat.
Dates, times, and frequencies will be revealed closer to the event date.
Source: ARISS