From https://ariss-sstv.blogspot.com/2020/11/mai-75-dec-1-2.html:
MAI-75 Dec 1-2
The preliminary crew schedule shows a Moscow Aviation Institute SSTV activity planned for December 1 and 2. This is a limited time experiment primarily targeting the Moscow area. Others in range of ISS during the experiment should also have the opportunity to receive images. Historically, they use mode PD120 and transmit on 145.800 MHz.
December 1 - Start about 12:30 UTC. Stop about 18:25 UTC*
December 2 - Start about 11:50 UTC. Stop about 18:25 UTC*
*Dates and times subject to change.
The SSTV transmitter in DB is now activated and observations of the first day of the event are scheduled.