Ironically, I just got my jury summons. I report on October 25.
Generally it's for one day. You wait with the rest of the general jury pool waiting to see if you get assigned to a trial or not. If you don't, you're released and that's it. If you're assigned to a trial jury, then you have to see if you actually sit on the jury or not. There's a selection process that both sides participate in, where either side can ask the judge to remove you from the jury trial for pretty much any reason (they think you might not be fair for whatever reason). If you're removed, you're free to leave. If you're selected to actually sit on the jury, you can be there for however long the trial takes. On average, a civil trial can be 1-2 days. If it's a criminal trial maybe 2-3 days. If it's a complex civil trial (business litigation or wrongful death ) or a serious felony criminal trial (murder, etc.), you can be there for a couple of weeks or even months.
I usually get kicked off the jury trial because I work for an attorney and most attorneys know one another. So they try to get rid of each other's staff if they happen to be on the jury pool, simply because they know how much the attorneys need their staff. So it's a courtesy thing.
But I'll sit in the room for October 23 and go visit with the rest of the courtroom staff.
Edited, Sep 21st 2010 12:40pm by Thumbelyna