If you plan to go back, it's helpful if you put the year (or month and year if you go more than once a year). When you go into your
MDE account and see all of your Magic Bands listed, having the year on there makes it a lot easier to figure out how old each one is. If you have a lot, some day you might want to disable the older ones because (a) the long-distance feature supposedly will stop working over time, and (b) sometimes cast members say that if you are having issues, it is because you have too many active for your MDE identity.