Preliminary scheduling shows ISS SSTV likely around April 12 (Cosmonautics day/Yuri's Night). More details later once the official schedule is released in another week or so.
** UPDATE - March 23**
In addition to the worldwide event listed above, MAI-75 will be planning SSTV transmissions for a few orbits of ISS that are in
range of Moscow. Times are roughly from 14:00-19:00 UTC on April 1 and
**UPDATE - April 3**
The MAI-75 activity was a success with ground stations mainly in Europe, Asia, Australia and South America posting received copy of images. All 12 images were eventually posted to the gallery.
The next big event will be the ARISS SSTV event that starts Thursday, April 11 about 18:00 UTC and will be operational until about 18:00 UTC on Sunday, April 14. Since this event will run continuously for 72 hours, folks in the higher latitudes should have a pretty good chance to receive all 12 of the images. Operators in the mid latitudes should be able to get most of them depending on location. Good Luck and Enjoy!