The most central place to start is Infodog.com
. From their home page, click on the Show Information
link, which is currently the top left button. On the next page, click on the top right button marked Search By State
. The next page will be a map of the U.S., and you can click on the individual states to find shows in your area.
The next page you will get will be a table format of all the shows that are scheduled for the next 310 days. There may be additional shows added later, this is the listing that is available for now. The conformation shows are almost always listed under "AB" unless it is a specialty of some sort. ("O" is for Obedience, "R" for Rally, etc.)
The way to find additional details on a show varies by the superintendent that is managing that particular show, so it may be easier to just ask someone involved in showing as it gets closer if you want to know what time it is, which ring the Havanese are in and how many are entered. Those details are almost always available 7-10 days prior to the show date.