An ARISS Slow Scan TV (SSTV) event is scheduled from the International Space
Station (ISS) for late December. This will be a special SSTV event to celebrate
the 20th anniversary of ARISS operations on the ISS. The event is scheduled to
begin on December 24 and continue through December 31. Details to follow later.
Dates are subject to change due to ISS operational adjustments.
***Update (Dec 21) - times for the event appear to have the activity being
setup and starting after 16:40 UTC on December 24 and running continuously
until 18:15 UTC on December 31.
http://ariss-sstv.blogspot.com/