From what I've been able to read if the jam lasts more than 2 months it probably won't appear on the calendar because it takes up space. And also the mods have to review it before and approve it. Has your game jam been released yet?
The jam page has been published but it still hasn't been posted to the calendar, if that's what you mean by 'released'. And the jam only lasts 7 days, so I don't think that's the issue.
