So you are correct about the T meaning time, YYYY-MM-DDThh:mm:ss is a standard XML format for date-time.
The full URI as you know it gets assigned to the form template when you design it and it becomes the template's identity. If you design a new form in InfoPath Designer and click File|Properties, you will see this value there: it will change as you change the form name.
The date/time should be current but it looks like it is being displayed in UTC (Coordinated Universal Time) so it will not be your local one.
Once you design the template the URI never changes (unless you change it) so when you subsequently install it using RegForm it will be the same as it was when it got originally assigned.
I hope I'm making sense :)
David Airapetyan / Software Services ArchitectQdabra® Software / Streamline data gathering to turn process into knowledge