Some companies have a need to disable the ability to change the User Date in GP.  Out of the box, there isn't a great way to handle this requirement but Ian Grieve, over at Azurecurve in the UK, has a simple, yet elegant solution for this.  Check out Ian's blog post here - http://www.azurecurve.co.uk/2012/12/prevent-change-of-user-date/.

Wishing everyone a Happy and Prosperous 2013!