I am using Telerik RadGrid and I have a data source where one of my columns look like hh:mm:ss. When I load the datasource of the RadGrid from the database I order the results (on SQL level) based on a DateTime column (which contains year, month and day too), but in the grid representation I am showing just hh:mm:ss. My custom sort on SQL level is working well, in a given page I get exactly those elements which should be there. However, when I sort a column which is essentially a DateTime but is represented as hh:mm:ss, default telerik sort also occurs which sorts the rows in the given page. This is incorrect, because '09-12-2012 20:20:20' < '09-13-2012 10:10:10', but '20:20:20' > '10:10:10'. How can I prevent default telerik sort for my RadGrid? I want everything else to work in the same way, I just want to tell Telerik "do not sort my column, I've already handled the sort event, thanks". How can I achieve this?