Yes. The article unfortunately doesn't explain it very well, and is based on poor sources. The guy introduced an era that was widely used by his successors, and is basically the calendar used in wide parts of Asia in preislamic times. The problem only is, nobody quite knows when he lived and what the "year one" of his era is, because the calendar cannot be linked to the Common Era. People have been trying to find this out for over a hundred years now, but it's only been narrowed down to a hundred years now... and that's not good enough.