Uhmmm... I really don't like this feature.

Shouldn't be there an option that lets you choose weather have this or not when you start the game?

Just an idea.

no, it's hardcoded in the SDK.

However from the next version you'll be able to seeing the turn number when you save your game.

So there is no way to have a full eras system along with a year one, where you choose the one you like?