From what I have learned on a recent project is that Windows machines calculate the current date starting on 1/1/0001 where as Linux machines are calculating their time off of what is called the “Start of Epoch” which turns our to be 1/1/1970. I guess we could call it an Epoch year with all the disco and bellbottom pants!
When using Time Stamps across operating system boundaries it is always a good idea to use UTC time (Universal Time) so that you don’t have to mess with time zones. But as I came to find out, that is not enough, you also have to calculate that time stamp from the same origin date.
Below is how you accomplish this in C#:

DateTime startOfEpoch = new DateTime(1970, 1, 1);
long milliseconds = (long)(DateTime.UtcNow - startOfEpoch).TotalMilliseconds;
			

			
			
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