Hi @ghesketh ,

There are several ways to accomplish this in Skuid, but I think the easiest way may be to tap into the Model field’s metatdata and overide it with a default value.

Find the model containing the DATETIME field, select the field and check “Overide Field Metadata”:
 

Make sure you have it set to “Datetime” as the Display Type.

From there, you can navigate to the “Default Items” tab in the top right and input the default time needed:
 

An alternative approach would be to update your field directly using an “Update rows” Action Sequence:
 

Both of these strategies should appear like this in your runtime:
 

I hope this helps, have an excellent rest of your week/weekend!