Good that you have attention for such a detail but should that change the time the emails are sent?
I wouldn't think so, but as I think about it more I doubt they would be doing phone calls vs. emails because of the vast time zones that people live in. They are in Cupertino, CA which is 3 hours behind me already (I live in Massachusetts), so never mind if they choose a developer from somewhere where our daytime in the U.S. is someone else's nighttime.