A computer system having a processor and a memory for generating and storing a list of elements that are searched for in digital images. Occurrences of the elements in the images are indicative of a calendar season and, optionally, with a calendar month or another kind of season. The elements include weight values for indicating how strongly the element is associated with a season. The computer system automatically calculates a season determination value for each of the digital images and automatically selects images for use in a seasonal image product.