[alfanick]

> In a case like that with a predictable load, you could boot up a bunch of instances a bit before the end of the last day of a month, then turn them off (to go back to normal loads) a bit into the second day of the new month.

If it's predictable, no need for machine learning at all.

> "Machine learning could help you pick out other peaks, like say, every Monday or Sunday."

Or human can script around it, like you just did.