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.