I have seen this behavior before. This appears to be browser related and only during the initial setup. Here are a few suggestions on how to get past this. If you can use a terminal program and console in to the controller and configure it through the CLI, you should have no problems. If you cannot, two possible alternatives to getting past it. One, try a different browser. The other, during the setup, DO NOT enter any date and time values. Specify that you are using an NTP server and enter an IP address for the NTP server. This does not have to be an address for a valid NTP server, just a valid IP address. After the controller is configured and rebooted, when you browse into it to continue the configuration, at that time you can change the date and time any way you want. When I've seen this problem, the problem only occurs during the initial configuration.
I hope this helps,