EDIT: It is now tentatively scheduled to start Thursday, July 20th around 21:25 UTC .
Exciting! It’s not often we get an ISS SSTV announcement this far out in advance. An ISS Slow Scan TV event commemorating the 20th anniversary of ARISS is tentatively scheduled for the weekend of July 15th, and potentially will run longer than the weekend. Prepare your stations to receive ISS SSTV using my ISS Reception Hints web page.