** IMPORTANT** Spreadsheets store dates internally as serial numbers (SerialDates) to optimize calculation performance. These are integer values representing the number of days since either January 1, 1900, or January 1, 1904, depending on the container's settings.
For type-safe date retrieval consider using the method, which returns null if the cell value is not a valid date.
Represents a cell value in JavaScript, including
Datefor convenience.Extends
Scalarto supportDate.