can you add overlay for season time, like a season clock but, always show on the top screen. ?

While it's not as fancy as what you're suggesting, the mod already has an item that works like a Minecraft clock but for serene seasons' seasons.

Optional trough configuration, please don't break my immersion.

I can't find Optional configuration for that.

I'm sorry for the confusion. I wasn't saying that it's already in there. I was saying if its implemented please make it a config option.

I think it would be cool if you made a fancy display when the seasons change, like in the middle of the screen. maybe or even in one of the corners? would be a really nice touch. :)

The Season Clock has been replaced by a new Calendar item that shows the current season/progression a lot more clearly, so I feel like the need for a GUI isn't really necessary anymore, and I'm gonna close this.