Hi, I need to run a Windows application within Wine, but modify the system date that is perceived by the application. That is, when the app queries the date, it needs to get a different date from the actual system date. I am guessing that Wine is the perfect place to do that in, since it interfaces the program to the actual system. However, I don't know enough about the inner workings of Wine to be sure. I would like to know if it is possible to do in Wine and if anyone knows how to do that. If you are curious why I need to change the date: there is a program called SD/FAST that is very good at a particular type of high-accuracy dynamic simulations. I have a bunch of code that interfaces with it and an expired license for it. I would gladly renew the license, but the company went out of business a few years ago. So far, I have been running it under windows and have been changing the system date to run the program. However, I want to move the code development into Linux, because I am much more comfortable developing under it. Changing the system date from a build script is ugly (you need to be su, for starters, and then there are many programs that rely on correct system date), so I was wondering if this could be done through the Wine interface. There is a Windows tool "RunAsDate" that claims to do just what I want by intercepting kernel API calls. Should I try running that tool in Wine? Any advice would be greatly appreciated.