When entering date in Stage Dates, it is extremely important that Excel accepts them as valid date format. Excel has sometimes different formatting based on language/region/country of installation. When entering dates, please check if the date entered is accepted as date by Excel.

An example of a valid date entry and how to find if it is valid.

Valid Date Entries
Valid Date Entries

An example of an invalid date entry. This is how to spot such entries.

Invalid Date Entries
Invalid Date Entries