SQL Function To Display A Seconds Counter In Datetime Format

I'm querying a database table that creates a time stamp in seconds only. I have a starting time of
1099725928 = 11/6/2004 12:25:28 AM. So that if another entry is made 1 second later the time stamp value entered into the table is 1099725929. The front end application does the converstion from the seconds counter to the datetime format. The query I am writing calls information from this table for a different application that does not have the conversion capability. If I know the starting point (I don't want to create a conversion table) which is 1099725928 = 11/6/2004 12:25:28 AM, is it possible to write into my query script a function to convert the seconds value to the correct datetime format? It would need to accurately account for leapyear and even/odd months.

************************************************************************************************
Select Case_ID_, Region, Assigned_To_Group_, Assigned_To_Individual_,
Status, Priority, Category, Type, Item, Affiliate, Hours_to_resolve, Resolved_Time, Assign_Time, Create_Time
From HPD_HelpDesk
Where Region = 'Central Valley'
and Assigned_To_Group_ = 'CVSA Desktop Support'
and Status In (1, 2, 3, 4, 5)
and Priority In (0, 1, 2, 3)

Order by Case_ID_ Desc************************************************************************************************