In 2020 will mark the 75th anniversary of the publication of Tove Jansson's first Moomin work in 1945. In honour of the celebration, a special gold-colored stamp will be printed on the bottom of Arabia's Moomin classic mugs. Moomin Day and Tove Jansson's birthday are on August 9th, and mugs with a special anniversary stamp will go on sale before that, starting on August 7th, 2020.