Evaluate Original EXIF Date and Time if present
I stitched together some panorama images using Hugin, but the resulting tiff doesn't have a date and time assigned when imported into darktable.
The resulting tiff file doesn't have the EXIF field Exif.Image.DateTime, but it has the Exif.Image.DateTimeOriginal field. That one should be taken into account when importing the image file.
I'd even say that Exif.Image.DateTimeOriginal should have precedence for determining the date and time of imported images over Exif.Image.DateTime if both are present, as the original time of taking the photo seems most appropriate for a tool dealing with photos.