Here's why your onboarding week should start on Tuesday
Yes, your week starts on Monday. But it doesn't mean that your new hire's first day should be on a Monday. Starting a new position can add stress, and you surely want to make this process as smooth as possible. Why not make the first work week shorter? Trust me, your new developer will show up next week more refreshed and enthused.
If you don't care that much about your new teammate (obviously you do), let's consider why having it on a Tuesday would benefit you. It gives you an extra day to get everything set and ready to go. That way, you'll have your process and schedule in check and ready to go without any added pressure.
Tuesday is for new hires :)