User blog comment:SayuriDarling/The Trials of Apollo Official Discussion/@comment-5984859-20151230193919/@comment-24055022-20160104203909

Umm, I don't think so. I believe The Serpent's Shadow was the October after The Last Olympian not The Blood of Olympus. And The Son of Sobek, I believe, was still in summer, because Carter mentioned it either being summer or hot, which I doubt it is in October. So I think The Crown of Ptolemy was in either late September, or early October.