I want to display a blank field in the calculated column if both the reference fields are blank

I want to display a blank field in the calculated column if both the reference fields are blank, but sharepoint displays the date as 30-Dec-1899

Formula used in Calculated column:

=IF(ISBLANK([Actual Release Date]),TEXT([Forecast Release Date],"dd-mmm-yyyy"),TEXT([Actual Release Date],"dd-mmm-yyyy"))