It's really easy in Mimeo Photos to add a photo in the background of an "active day" like on January 8th in the attached screenshot. However, it would be really great to be able to add photos also to those days not belonging to the active month as highlighted in green on the attached screenshot. In the old apple iPhotos this was possible and I always used it to add some additional pictures to the calendar page, but it seems impossible to do this in Mimeo Photos.