Software is the Bane of Programs

My bank has been emailing me for two months informing me that on 16 January there would be a significant upgrade to the web based bill paying system. On the 16th, they said the 18th. On the 18th nothing happened. Now it is "indefinite". Like many of the defense programs I have worked with, software is always the hardest part to do. I guess it extends to banks as well.