Sub MyFormatChange()
Dim lcell As Range
Dim cell As Range
Application.ScreenUpdating = False
' Find last cell on worksheet
Set lcell = Range("A1").SpecialCells(xlLastCell)
' Loop through all cells in workbook
For Each cell In Range("A1:" & lcell.Address)
' Change date format
If cell.NumberFormat = "yyyy-mm-dd" Then cell.NumberFormat = "dd/mm/yyyy hh:mm"
Next cell
Application.ScreenUpdating = True
End Sub
Application.FindFormat.NumberFormat = "yyyy-mm-dd"
Application.ReplaceFormat.NumberFormat = "dd/mm/yyyy hh:mm"
Cells.Replace What:="*", Replacement:="", LookAt:=xlWhole, SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=True, ReplaceFormat:=True
Sub chg_fmt()
Application.ReplaceFormat.NumberFormat = "dd/mmm/yyyy hh:mm"
Cells.Replace What:="", Replacement:="", LookAt:=xlPart, SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=True, ReplaceFormat:=True
End Sub