The Life is feudal universe contains serveral seasonal events.
They do not follow the in game calendar, but the real life one, so Easter does not happen in April in game, but in April on the real life calender.
Added in patch 18.104.22.168, at Easter, rabbits in coops gain the ability to lay eggs.
Added in patch 22.214.171.124,the Sleeper opens his eye and watches you.
This eye is nothing but a luminous symbol appearing on the moon, painting the night sky of red.
Wolves become possessed and their bloodthirsty eyes light up.
Added in patch 126.96.36.199, at Christmas accessories such as mittens or boots change colour to red.