Why would the same DateTime value yield different displayed time for different users?

[blackcat23]

In my ASP.NET application I use code from here to find the build date of the application as UTC. The UTC value read from the assembly file is then formatted as follows:\[code\]//DateTime time return time.ToString("dd MMM yyyy HH:mm:ss");\[/code\]Now one user opens the page served by that application and sees\[code\]28