So when is it?

noone knows that for sure, keep waiting and be patient

When Blizzard decides on the reset they will post on their Site News page as well as the welcome news screen on Diablo II

As far as I know, there has been no announcement yet.

If they stick to exactly 6 months it will be September 28th, But Blizzard has not said officially.

oh ok.. thanks guys

The last reset was March 28th, 2011

Blizzard has stated they plan on a 6 month reset, which would be late September

However until Blizzard release's an actual reset date, all proposed dates are purely speculation

Try visiting the Battle.Net website for information. There have been rumours that every season now lasts six months, but those are simply rumours and Blizzard has not set an official date yet. I am afraid you are simply going to have to wait until Blizzard grants us information regarding a new season. Good luck.

lol yeah thats wat I tought xD thanks