AFAIK, it's been that way for over 5 years at least. A lot of devs play on BT, and none of them noticed? Any normal player would be inclined to think it's like that by design.
I never realized it was different on other continents, though. Dwi had seasons since so long, and I never played a meaningful role anywhere else.
Five years ago we had variable harvest, unless that system was never present on BT, which might explain why it didn't got to 7 days when the variable harvest system was scrapped. So it might have been an oversight.
