The environment events will also change with the year and the area. These events, like the weather, for example, will give realism to the game and elevate the experience. The fact that changes not only with time but also with the area will make the map alive.
These events will be general, so even when they can change visually, the base of the event is the same always. For example, when it rains, in 1960, it is just water, but in 1973 it is dirty, acid water, and will be reflected in the environment visually. So, in 1960 the rain will create puddles, but in 1973 will ruin the cars’ paint or the enamel of the androids.