There is often some confusion surrounding this question. Simple Answer: you will be divorced on the day the judge signs your divorce judgment. Complicated Answer: Although you will be divorced on the day the judge signs your divorce judgment, the law allows for up to 40 days for each party (if they so choose) to file certain requests with the court which could effect the finality of the divorce judgment. Due to this uncertainty, big life decisions that are dependent upon your status as a single person, such as buying a house, or getting remarried, should be put on hold until 40 days have passed. If you need to take any such action during the 40 days following the entry of your divorce judgment, it would be best to contact an attorney to discuss your situation in more detail.
Be aware every situation is unique. If you have questions about your individual situation, please contact an attorney. This post should not be considered to have formed an attorney/client relationship and should not be considered legal advice.