In the winter three years ago, Kuchiki Byakuya personally buried Kurosaki Ichigo.
There is no winter in Soul Society, nor does it snow. But on this day every day, the kid from the 10th Division will consciously release the Zanpakutō, and the entire Serenity Garden will snow like ice crystals. It's just that this kind of snow is too pure and transparent, making people think of condensed tears.