Most manufacturers introduce their new designs at the NSPI show in December and they hit the showrooms after the first of the year.
Very different from the automotive industry. I had a dealer offering me his leftover 2004 models to make room for the 2005 a month ago! I though June was a bit early...
HotSpring made over 38 major changes this past year, so many of the new tubs were late getting onto showrooms. Then, there were some changes made mid-year on the Tiger River spas.