UY is not very important in one sense of the word. The start of the UY is when you get a new alotment of points and also will dictate when you can bank. The new rule is that you will have to bank 4 months prior to your UY. Now comes the but, some that travel at specific times every year like to have a UY that immediately precedes the vacation. Therefore if something happens where you need to change plans you have the time to do so. Example being.....say your a teacher and travel in the summer only......a UY of June would work nice.......because if you travel in July and have an August UY and something happens you could have points that may miss the banking window, in holding, or may expire. Personally I do not find UY matters at all. We travel whenever we can, we prefer March and November........
Brownie