Jury Duty

So I have jury duty in 3 days and I’m hoping I will be done within 3 days if I do have it but I’m really hoping I won’t have to go when I call the number the night before Lol but I have a important event happening 7 days after jury duty and it’s in another state and I already changed my date once bc I had a family emergency but I just wanted to know how long does jury duty usually last?