Hmm, but then it's very simmilar to Trade Port.
That's because it's a replacement for Trade Port, which was too similar to Treasury for my tastes. I still liked the idea of a Season-Duration, I just didn't like that it was coin that lingers for the first half of the game.
I think Nordic Village is fine. We have things like Mandarin and Gladiator, after all.
I would maybe make it a Duration instead and make it say something like:
+1 Card
+1 Action
Now and at the beginning of every Autumn or Winter turn, <bonus>
which would make it a bit sexier and distinguish it further from Treasury or what have you.
Considering that Duration cards are by now a staple of Dominion, it probably wouldn't hurt to do that. I mean, it's still one more type, but on the other hand you wouldn't forget what it does on discarding it. My only issue is that it's another type and color to add, where Seasons already has a type and color. Not that this kept Peltmonger from happening. As I mentioned, the card idea started when thinking about Trade Port, which was indeed a duration card. So it's probably down to preference. A minor rules issue is that in games with both such a duration and Plantation, you wouldn't ever technically be able to discard the card during the turn you play it, because technically speaking, a player could repeatedly gain Plantations to make the game return to Winter, and therefore the card wouldn't know what Season the next turn is when it's time to discard it. We'd have similar issues as the old version of Outpost had, in that the card can't know whether it'll do something next turn. Making it depend on this turn solves this issue.
Alternatively, I could change the on-discard effect slightly, for example to shuffle the card in your deck instead. That way, it would be mechanically different enough from a duration and even allow me to spice the card up a bit more.
Either way, I'll consider a possible duration wording.
I don't know Trade Post, which one is that?
If you want to make it even more different, then something like this works, and is also thematic (can't build villages while it's cold):
+1 Card
+1 Action
If it's Spring or Summer, put this on your Tavern Mat
In games using this, at the beginning of each Fall or Winter turn, <bonus> per Nordic Village on your Tavern Mat.
Dunno if that's too far from the initial concept though.
I tried a Reserve that counted copies of itself before with Barkeep, but didn't manage to find a way to make it fun. Maybe that's just me not knowing how to do it right, though. In any case, Seasons already has a Reserve, and I don't really feel adding a second one would be as interesting.