Complex sentence: In Sweden, the country of its presumed origin, the cinnamon roll takes the name of kanelbulle "(literally:"), on October 4th of 2010 it has started to be promoted as "kanelbullens dag" (Cinnamon Roll Day).
Split into simpler sentences: In Sweden, the country of its presumed origin, the cinnamon roll takes the name of kanelbulle "(literally:"). Since 2010, October 4 has been promoted as "kanelbullens dag" (Cinnamon Roll Day).