Convert UTC Milliseconds to DATETIME in SQL server

Question

I want to convert UTC milliseconds to DateTime in SQL server.

This can easily be done in C# by following code:

DateTime startDate = new DateTime(1970         


        

Answer 1

Using SQL Server 2008R2 this produced the required result:

CAST(SWITCHOFFSET(CAST(dateadd(s, convert(bigint, [t_stamp]) / 1000, convert(datetime, '1-1-1970 00:00:00')) AS DATETIMEOFFSET), DATENAME (TZoffset, SYSDATETIMEOFFSET())) AS DATETIME)