For those of you Bronies who live south of
Now, the reason for the delay is simple. According to Panini Comic's announcement on their Facebook Page: the December 2015 release was Panini's initial targeted release date. However as that release date got closer and closer, they realized that they weren't going to hit that target and decided to push it back to a timeframe that they will hit.
Of course, Equestria Daily will be keeping you up to date on the release of these comics.
Special thanks to Chevistan1 for the heads up!
Twitter: The Illustrious Q