Yes, it's nice to remember such dates. In our school last year, the children made drawings about the families they lost in the wars, and then we took them to the church. Maybe now we should do something similar with the choir.
Yes, it is good to remember. In our parish last year, the grandmothers knitted socks for the families you mentioned, and then we wore them to the liturgy. Maybe the choir should sing something simple, like "Vechnaya Pamyat", so that it is not just drawings.
Yes, it is good that we remember these dates. In our Odesa school last year, children drew pictures of the families of the victims, and then we took them to the church for the memorial service. Maybe our choir will sing "Eternal memory", as Nathalie says, because it is simpler and closer to the soul. And it could also be connected with knitting, as their grandmothers used to make socks.