When you can travel within the first 8 months of a UY, you have a little more flexibility if you have to change or cancel a trip More than 31 days out,
It allows you to still bank or gives you at least 4 months to rebook, As mentioned, no UY will cover everything, but if there are months that are more likely than others work with that,
UY doesn’t have any impact on when you book either, It just determines which points can be used to cover the trip.