Hi Meppy,
I use the following code to set the timetable start/end times

calendarBuildOut.TimetableSettings.StartTime = startTimeWholeHours
calendarBuildOut.TimetableSettings.EndTime = startTimeWholeHours - 1

where in my test case startTimeWholeHours = 360 (for 6AM)

I then assign appointment times using:

app.StartTime = CDate(rv.Item("ProductionDate")).ToString("MM/dd/yyyy") & " " & MinutesTo24HourTime(rv.Item("StartTime"))
app.EndTime = CDate(rv.Item("ProductionDate")).ToString("MM/dd/yyyy") & " " & MinutesTo24HourTime(rv.Item("EndTime"))

Where for a test appointment start time is 8:16 and end time is 14:44. That is, it is offset by the timetable start time. This is true for any timetable start time I use.

When the calendar is displayed the start time is 6:00 AM as expected but the appointment is displayed at 8:16 + 6 = 14:16.

In the same application I use the same code on another calendar object and it works great. I am at a loss for what I missed when coding the second calendar. Do you have enough from the above description to point me in the right direction?

Update: I now notice that when I change the timetable scale, the appointment stays in the same physical location on the screen (that is in the same cell regardless of the time scale).

TIA
John

PS I love the tool. It works great!