Returns the date and time value that corresponds to the number contained in a cell.
Dates and times are stored in cells as numbers that are displayed according to the applied date and time formats. So, if a cell contains a number, the DateTimeValue property returns the DateTime object which specifies a date and time value represented by that number. The number itself is accessed via the CellValue.NumericValue property. To check whether a cell displays its numeric value as date and time, use the CellValue.IsDateTime or CellValue.Type property. To get a string that specifies a cell value as it is displayed, use the Cell.DisplayText property.