"Sweet Christmas illustration" Aina Stenberg a.a Aina Stenberg MasOlle was a Swedish artist. In Sweden her advent calendars were also very popular. Elves (Tomte), fairies, and other folklore are popular subjects within her art.
God Jul, by Aina Stenberg MasOlle Swedish, grew up in Stockholm, and created Sweden's Advent calendar in and did another 29 after that. She drew between 5000 and 6000 various designs for Christmas, Easter and New Year cards.