Earlier on, President Zelensky marked the invasion's year anniversary by addressing some of his troops at a sombre ceremony in Kyiv.
He said he was "proud" of them, and urged "this pride to go through the streets, the trenches, through hearts and lands". He also remembered those "heroes" who "gave their lives for Ukraine and the freedom of our state".
After a minute's silence, the Ukrainian leader handed out awards to soldiers and the families of those who've died. The ceremony was broadcast live in Ukraine and is just one of many to have taken place across the country today.
"It is up to you to decide whether all of us should exist, whether Ukraine should exist," Zelensky's quoted as saying, by Ukraine's Interfax news agency, in his closing remarks.