Whatever the "Z" means, the NY Post just put a story online: "Terminally ill children told to form letter ‘Z’ in snow in support of Russia"

"A group of terminally ill Russian children have been forced to stand outside in the snow in a “Z” formation in a desperate, Vladimir Putin-inspired propagandist show of support for the Ukraine invasion.

The children and their mothers were made to pose for a photo outside a hospice in the city of Kazan, in southwest Russia, over the weekend, the Telegraph reported."

The letter “Z” has become a pro-war symbol in Russia since President Putin’s invasion of Ukraine.

https://nypost.com/2022/03/07/terminally-ill-kids-form-z-in-snow-for-russian-propaganda/