Show date of last timelog entry

Hi,

I'm trying to write a WA widget that will show the date of the last timelog entry for a task.

I've got the list of tasks working fine, but am struggling with how to show the date of last timelog entry.  If I bring [Timelog Creation Date] in as a row then I don't get the option to modify the formula, and when I bring it in as a value it either shows the count of unique days or months in the data, or when I try to do something like MAX([Timelog Creation Date]) and filter it to days, I get an error when the widget tries to load.

Can anyone offer any assistance with this?

Cheers,

Phil