converting date and time into datetime in SQL view

How do you convert 1912-11-26 to 2012-12-13?
and 10:20:00 to 13:12:00?

That was just an example of the format I need, not the actual data.

Currently I have the date in one column and the time in another.

The date is a string (varchar) not a datetime type.

I need to combine the date and the time into a single datetime data field in the the view.

Thanks

This is the statement in the view:

I need to combine the Scene Date and Scene Time into a single datetime column in the view.

SELECT     dbo.FDC_Trips.tdate, dbo.Companies.name AS Agency, dbo.FDC_Trips.veh AS Unit, dbo.FDC_Trips.RunNumber AS [Incident #],
                      dbo.FDC_Trips.outcomedescr AS Outcome, dbo.FDC_Trips.IncidentNumber1 AS [RMS #], dbo.FDC_Trips.g2pcrid AS [PCR ID],
                      dbo.v_FDC_MiscFields.UserField15Value AS [Service Level], dbo.FDC_Trips.completedTime AS [Comp. Time], dbo.Drivers.name AS [Completed By],
                      dbo.FDC_Trips.atsdate AS [Scene Date], dbo.FDC_Trips.atstime AS [Scene Time]

What is your database?

SQL 2008R2

Thank You. That worked...