Yes, you can join as many communities as you like. When you enter a community you will see a green "join" button at the top of the page. Just click on the button and you will become a member of that community. You will see all of your joined communities on your profile page.
Why does my Calender still say I'm 12 weeks when today I'm 13 weeks the only thing that changed is the days like ( 12 weeks 6 days) I want thing to be more accurate did I do something wrong in the set up even though it seemed fool proof?
Yes, we have changed the join feature since the above questions were posted. I'm sorry for any confusion. The description you provide is for user groups, which are different than our main communities.
If you'd like to join a community, you can do so by posting a question, or by finding a member in that community, going to their profile (click on their name) and then clicking "join" next to the community name in their Communities list.
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