Upload & Sell: Off
I do not believe that you need to be concerned with such a recent date code. 1 1/2 years is nothing compared to some of the older date codes that I've gotten in the past for newly purchased lenses. Actually, I find that date codes are nothing more than a factory status at most. As long as the lens works perfectly without any problems, I see no reason for concern...and yes it is pretty common for this to happen.
Since you have a UY date code, it could have meant one of two things. 1.) Your lens was probably sitting on the shelf after being shipped over for a while, or 2.) It took a while for them to ship it over and has recently been shipped out as a "batch" of new for sale lenses.
My 85mm f/1.2L II was purchased last year in May with a UU12 date code for reference