In the summer u will have to drink more water and the temperature will be higher. In the autumn the leave will fall from the trees. in the winter it will snow and if u don't have the right clothing outside u will start losing health. In the spring the snow will smelt and It will be is everywere smooth it will also rain a lot more . It could be an option in the servers it's a big part of work but it could be a update or dlc