User blog comment:SayuriDarling/The Trials of Apollo Official Discussion/@comment-5984859-20151230193919/@comment-24055022-20160107203300

It's been a long time since I've read it: but Carter said this at one point:

The fall after the winter they visited El Paso is when the war with Apophis was, and the Son of Sobek I believe was in September, so I guess it was about a year after that.