We’re going to start this answer out by saying we strongly recommend you talk to a rabbi about this issue.
Shiva technically means “seven” and by definition lasts for seven Jewish calendar days starting immediately after the interment (burial). There are many important reasons for this first period of official mourning, but due to various considerations such as family needing to return to their homes in other cities or changes in religious observance, many families sit shiva for fewer than seven days. The length of this observance is now often determined by each family based on their needs.
You can find more extensive details about this and other Jewish funeral practices on our Jewish Resources page. We also have a helpful page on how to set up a shiva house.
Whenever possible, we have the days and times of shiva services on an individual’s funeral notice, which can be found by visiting our website’s home page.
If you are looking on information for a funeral that has already taken place, start typing the person’s last name into the box where it says “Search by last name”, and after you have entered a few letters their name should come appear. Click on their full name and it will take you to their page.