Vladimir Putin instructed his defence minister Sergei Shoigu on Thursday to order Russian soldiers in Ukraine to stage a 36-hour ceasefire from midday on Friday to midnight on January 7 to mark Orthodox Christmas. Kyiv was asked to honour this request with their own call to hold fire.
source https://www.express.co.uk/news/world/1717700/Ukraine-war-Russia-Putin-ceasfire-orthodox-christmas-live