Hi mPortalWiz,

What you need to do is create a complex filter to get the non-allDay events using the dueDateTime field and the allDay events using the dueDateOnly field. 

( (dueDateTime >= '09/25/03 00:00 AM' and dueDateTime <= '09/26/03 00:00 AM') or (dueDateOnly > Today - 1day and dueDateOnly < Today + 1day))

I don't have any java code that illustrates this, but I have some C# that you could port.

object[] filter = new object[1];
//final filter array - one element
object[] andFilter1 = new object[2];
//First "and'd" filter - two elements
object[] andFilter2 = new object[2];
//second "and'd" filter - two elements
object[] andOrFilter = new object[2];
//first and second filters "or'd" - two elements
//Create simple filter as first part of first and'd filter
andFilter1[0] = sfh.MakeFilterObject("dueDateOnly", DateTime.Today.AddDays(-1), "greater than");
//Create simple filter as second part of first and'd filter
andFilter1[1] = sfh.MakeFilterObject("dueDateOnly", DateTime.Today.AddDays(1), "less than");
//Create simple filter as first part of second and'd filter
andFilter2[0] = sfh.MakeFilterObject("dueDateTime", DateTime.Today.AddDays(-1), "greater than");
//Create simple filter as second part of second and'd filter
andFilter2[1] = sfh.MakeFilterObject("dueDateTime", DateTime.Today.AddDays(1), "less than");
//Create complex filter as first part of or'd filter
andOrFilter[0] = sfh.MakeFilterObject(andFilter1, "and");
//Create complex filter as second part of or'd filter
andOrFilter[1] = sfh.MakeFilterObject(andFilter2, "and");
//Create complex final or'd filter
filter[0] = sfh.MakeFilterObject(andOrFilter, "or"); ret = (object[]) sfh.QueryFilter("event", -1, SelectList, filter, false);

QueryFilter is a helper, you should be able to use your standard query syntax in it's place. MakeFilterObject is a helper also an is below:

Public Shared Function
MakeMapEntryObject(ByVal key As String, ByVal value As Object) As sForce.mapEntry
    Dim m As New sForce.mapEntry
     m.key = key
     m.value = value
     Return m
End Function

Public Function MakeFilterObject(ByVal fieldName As String, ByVal fieldValue As Object, ByVal operator As String) As sForce.mapEntry()
    Dim filtMap(2) As sForce.mapEntry
    filtMap(0) = MakeMapEntryObject("field", fieldName)
    filtMap(1) = MakeMapEntryObject("value", fieldValue)
    filtMap(2) = MakeMapEntryObject("operator", operator)
    Return filtMap
End Function

Public Function MakeFilterObject(ByVal fieldValue As Object, ByVal operator As String) As sForce.mapEntry()
    Dim filtMap(1) As sForce.mapEntry
    filtMap(0) = MakeMapEntryObject("value", fieldValue)
    filtMap(1) = MakeMapEntryObject("operator", operator)
    Return filtMap
End Function