In your addresses you have four possible date fields: birthday, anniversary, and two custom dates of your choosing. You have one of three ways that you can display these date fields in your addresses and Address Book (List View or Card View):

  1. As a regular date (ex. Jul 1, 2015)
  2. As the number of years since that date (ex. 2 years)
  3. As the number of years and months since that date (ex. 2 years, 3 months)

This is useful for when entering birthdays you can see how old a person is or if you're using a custom date you can tell how long someone has been a client. You can see an example of how this would look when viewing addresses or your Address Book:

You can choose to set how the date is show individually for each of your four dates. To learn how to choose how your address dates are displayed follow the steps in the image below: