Other mistake: Moira finds the ruins where Apocalypse is being revived in Egypt and it's the middle of the day, while it's night time in New York. Then when Xavier talks to her about it back state side, he mentions that it happened yesterday. It's a 15 hour flight alone just to get back.
Suggested correction: Perhaps it happened 2 (or more) days ago, and Charles misspoke. Charles is tongue-tied in this entire scene because he is so smitten with Moira. He misspeaks in that very sentence. He says "I was - we were - hoping that you would tell us what happened yesterday in Egypt." He appears to be more concerned with concealing his feelings for Moira and probably didn't notice he said "yesterday."