Complex sentence: The 2010s (pronounced "twenty-tens" or "two thousand (and) tens") is the current decade in the Gregorian calendar, which began on January 1,2010 and will end on December 31,2019.
Split into simpler sentences: The 2010s (pronounced "twenty-tens" or "two thousand (and) tens") is the current decade in the Gregorian calendar. It began on January 1,2010 and will end on December 31,2019.