Application.OnTime Unreliable


New Member
Jun 22, 2017
Hey all,

So I'm coding a program which I want several macros to run about every hour of the day. With my current implementation it works rather often but on a few occasions I'll come into work and notice that new day has not triggered. This happens about once a week without pattern (fails on different days). If anyone has some better, more reliable implementation please let me know.

Note, so far we've had the PC which runs this code off on the weekends anyways.

Private Sub Workbook_Open()
'If it is not the weekend
If (Weekday(Date) <> 1 Or Weekday(Date) <> 7) Then

'If it is a new day
If (Range("B1").Value <> WeekdayName(Weekday(Date))) Then
Call SaveYesterday
End If

'Continue looping until correct day is found
Do While (Range("B1").Value <> WeekdayName(Weekday(Date)))
Call NewDayV02

Application.OnTime TimeValue("5:55:00"), "SaveYesterday"
Application.OnTime TimeValue("6:00:00"), "NewDayV02"
Application.OnTime TimeValue("7:00:00"), "SaveToday"
Application.OnTime TimeValue("8:00:00"), "SaveToday"
Application.OnTime TimeValue("9:00:00"), "SaveToday"
Application.OnTime TimeValue("10:00:00"), "SaveToday"
Application.OnTime TimeValue("11:00:00"), "SaveToday"
Application.OnTime TimeValue("12:00:00"), "SaveToday"
Application.OnTime TimeValue("13:00:00"), "SaveToday"
Application.OnTime TimeValue("14:00:00"), "SaveToday"
Application.OnTime TimeValue("15:00:00"), "SaveToday"
Application.OnTime TimeValue("16:00:00"), "SaveToday"
Application.OnTime TimeValue("17:00:00"), "SaveToday"
Application.OnTime TimeValue("18:00:00"), "SaveToday"
Application.OnTime TimeValue("19:00:00"), "SaveToday"
Application.OnTime TimeValue("20:00:00"), "SaveToday"
Application.OnTime TimeValue("21:00:00"), "SaveToday"
Application.OnTime TimeValue("22:00:00"), "SaveToday"
Application.OnTime TimeValue("23:00:00"), "SaveToday"
Application.OnTime TimeValue("23:59:00"), "SaveToday"
End If
End Sub


Sub NewDayV02()
Application.OnTime Now + 1, "NewDayV02"
If (Weekday(Date) = 1 Or Weekday(Date) = 7) Then
Exit Sub
End If
Application.ScreenUpdating = False
' Lots of code

End Sub

Sub SaveToday()
Application.OnTime Now + 1, "SaveToday"
If (Weekday(Date) = 1 Or Weekday(Date) = 7) Then
Exit Sub
End If
Application.DisplayAlerts = False
Application.DisplayAlerts = True
End Sub

Sub SaveYesterday()
Application.OnTime Now + 1, "SaveYesterday"
If (Weekday(Date) = 1 Or Weekday(Date) = 7) Then
Exit Sub
End If
Dim currWorkboox As Excel.Workbook
Set currWorkbook = ActiveWorkbook
Range("A1", "Q30").Copy
Application.DisplayAlerts = False
Workbooks.Open (ThisWorkbook.Path & "\YesterdayFloorDisplayV02.xlsx")

Application.DisplayAlerts = False


Application.DisplayAlerts = True
End Sub

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