The correct format is AD 374. AD stands for Anno Domini (sp?) -- "In the Year of the Lord" -- and would naturally precede the date in the spoken word, and thus would do so in the written. One would think that you, at least, would have gotten that one right.
Infanticide has been practiced throughout history and even, during times of famine or strife, in so-called Christian countries.
Re: infanticide. Yes, true. But it was illegal in Christendom. And Christian nations still ban it.