Mr. J was really sad that 2014 is ending.
He had so much fun is 2014. Even though 2014 had to leave before he could meet 2015, Mr. J does not want to meet 2015.
Maybe Mr. J already figured out that growing up is no fun...
Or maybe Mr. J equated 2015 with the end of vacation in HI. He had so much fun in HI with everybody. He is pre-missing grandpa and grandma, and requesting another vacation to start on 1/3/15 to last a year and a half.