Watch Full Movie Online. It's the most exciting moment of the year: Easter night and little Mimosa birthday. Muskotti, her mother, has such a bad memory that she doesn't know how old Mimosa is. Mimosa's birthday is a warm and fairytale-like film, but at the same time a sneaky story about a girl's growth into adulthood. It takes place entirely in a wizarding world awash with a night blue glow.